Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_argentina.py:228-229
Timestamp: 2025-11-08T04:56:18.070Z
Learning: Argentina: Good Friday ("Viernes Santo") is established from 1977 by Law 21329. In tests/countries/test_argentina.py, assert presence for range(1977, self.end_year) and absence for range(self.start_year, 1977); do not assert over self.full_range.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_french_polynesia.py:19-22
Timestamp: 2025-11-08T05:09:56.159Z
Learning: In the vacanza/holidays project's test framework (PR #2881 onwards), the base class CommonCountryTests provides a default test_no_holidays implementation that automatically tests years=start_year - 1 for standard PUBLIC category cases. Individual country test files should only override test_no_holidays when the country supports additional non-PUBLIC categories (GOVERNMENT, WORKDAY, OPTIONAL, etc.) with different start years requiring separate validation.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2530
File: tests/countries/test_andorra.py:23-28
Timestamp: 2025-05-06T21:07:11.577Z
Learning: In the holidays project, test methods for country holidays follow a standard form where year ranges are explicitly recreated in each test method rather than being stored as class variables, to maintain consistency across all country tests.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2354
File: holidays/countries/fiji.py:146-159
Timestamp: 2025-03-19T16:54:58.657Z
Learning: In the holidays library implementation, explicit holiday dates (like Diwali in Fiji) are only defined for historical years with official sources (2016-2025). Future dates beyond the explicitly defined range are automatically calculated by methods like `_add_diwali`, which provide approximations when official dates aren't yet available.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_south_africa.py:22-22
Timestamp: 2025-09-14T04:41:10.139Z
Learning: South Africa's observed holiday system only started in 1995, so in tests/countries/test_south_africa.py, using years_non_observed=range(1995, 2050) is intentional to limit testing to years where observed holidays actually exist, improving both correctness and performance.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_algeria.py:28-30
Timestamp: 2025-09-18T03:19:23.722Z
Learning: In the vacanza/holidays project, tests now use self.start_year and self.end_year from the TestCase class instead of country-specific aliases (like DZ.start_year) for start_year and end_year references. This approach provides the test framework with better control over test year ranges rather than being tied to specific country start years.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2386
File: tests/countries/test_nepal.py:499-536
Timestamp: 2025-04-05T06:49:06.217Z
Learning: In the holidays project, test files follow a dual testing approach: individual methods test specific holidays across multiple years, while comprehensive year-specific tests (e.g., `test_2025`) verify all holidays for a specific year in a single assertion. Both approaches serve different testing purposes and complement each other.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2642
File: holidays/countries/france.py:300-319
Timestamp: 2025-06-18T10:21:01.376Z
Learning: In the France holidays implementation, legislative years for holiday changes should be hard-coded rather than extracted into constants, as this maintains consistency with the existing codebase pattern and provides historical accuracy for specific legislative acts.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2416
File: tests/countries/test_turkmenistan.py:52-64
Timestamp: 2025-04-05T04:47:27.213Z
Learning: For holiday tests in the vacanza/holidays project, structure tests by individual holidays rather than by years. Each test method should focus on a specific holiday and test it across multiple years (from start_year through 2050) using helper methods like `assertHolidayName`. For fixed holidays, use generators like `(f"{year}-01-01" for year in range(1991, 2051))`. For movable holidays, specify individual dates for specific years followed by a range check.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2537
File: tests/countries/test_finland.py:23-26
Timestamp: 2025-05-09T18:36:09.607Z
Learning: The holidays project prioritizes complete historical coverage in tests, verifying holidays from their first year of observance (e.g., 1853 for Finland) through future projections, rather than using shorter sliding windows.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2653
File: holidays/locale/th/LC_MESSAGES/TW.po:17-21
Timestamp: 2025-06-21T18:06:50.027Z
Learning: KJhellico's username includes a tilde character (~) as part of their nickname (appears as "~Jhellico" in Last-Translator headers), which is intentional formatting and not an error.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2407
File: snapshots/countries/TL_COMMON.json:7-7
Timestamp: 2025-04-03T05:59:57.480Z
Learning: In the holidays project, snapshot files (like snapshots/countries/TL_COMMON.json) are auto-generated when running `make snapshot` and should not be manually edited. Semicolons (;) in holiday entries are used as separators when multiple holidays occur on the same date.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2354
File: holidays/countries/fiji.py:171-183
Timestamp: 2025-03-29T15:15:05.919Z
Learning: In the Fiji holidays implementation, the maintainers are aware of the need to extend the MAWLID_DATES dictionary beyond 2025 when future official references become available, and will do so when appropriate. No suggestions about extending this dictionary should be made in future reviews.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_french_polynesia.py:19-22
Timestamp: 2025-11-08T05:09:56.159Z
Learning: In the vacanza/holidays project's test framework (PR #2881 onwards), the base class CommonCountryTests provides a default test_no_holidays implementation that automatically tests years=start_year - 1 for standard PUBLIC category cases. Individual country test files should only override test_no_holidays when the country supports additional non-PUBLIC categories (GOVERNMENT, WORKDAY, OPTIONAL, etc.) with different start years requiring separate validation.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2654
File: snapshots/countries/CV_RS.json:471-478
Timestamp: 2025-06-24T17:26:17.728Z
Learning: Snapshot files in the holidays library (like those in snapshots/countries/) are generated automatically and should not be manually edited. Any issues with snapshot content should be addressed in the source code that generates them, not in the snapshot files themselves.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2833
File: holidays/countries/uganda.py:50-56
Timestamp: 2025-08-25T09:57:22.291Z
Learning: In the holidays package, when adding comments for year-restricted holidays in Uganda and similar country modules, include specific legal or historical context such as the actual laws, parliamentary acts, or government decisions that established the holidays, rather than just generic "since YEAR" information. For example, reference the specific Parliament act, decree, or historical event that created the holiday.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_south_africa.py:22-22
Timestamp: 2025-09-14T04:41:10.139Z
Learning: South Africa's observed holiday system only started in 1995, so in tests/countries/test_south_africa.py, using years_non_observed=range(1995, 2050) is intentional to limit testing to years where observed holidays actually exist, improving both correctness and performance.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_argentina.py:228-229
Timestamp: 2025-11-08T04:56:18.070Z
Learning: Argentina: Good Friday ("Viernes Santo") is established from 1977 by Law 21329. In tests/countries/test_argentina.py, assert presence for range(1977, self.end_year) and absence for range(self.start_year, 1977); do not assert over self.full_range.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2537
File: tests/countries/test_finland.py:23-26
Timestamp: 2025-05-09T18:36:09.607Z
Learning: The holidays project prioritizes complete historical coverage in tests, verifying holidays from their first year of observance (e.g., 1853 for Finland) through future projections, rather than using shorter sliding windows.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: holidays/countries/south_africa.py:69-75
Timestamp: 2025-09-14T07:26:25.431Z
Learning: When reviewing historical holiday implementations in the vacanza/holidays repository, trust the maintainers' research and implementation decisions for specific historical edge cases, especially when they can provide sources like Wikipedia or other historical documentation that supports unusual or complex date calculation rules during specific time periods.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2489
File: holidays/countries/sao_tome_and_principe.py:22-26
Timestamp: 2025-04-23T14:55:35.504Z
Learning: References in holidays classes should only be included if they're used for test case cross-checks or provide historical context about when holidays were added/removed, not just for the sake of having more references.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2354
File: holidays/countries/fiji.py:146-159
Timestamp: 2025-03-19T16:54:58.657Z
Learning: In the holidays library implementation, explicit holiday dates (like Diwali in Fiji) are only defined for historical years with official sources (2016-2025). Future dates beyond the explicitly defined range are automatically calculated by methods like `_add_diwali`, which provide approximations when official dates aren't yet available.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2821
File: holidays/countries/tanzania.py:37-83
Timestamp: 2025-08-15T19:16:14.119Z
Learning: PDF filenames in government holiday documentation may not always reflect the actual year covered in the content. The Tanzania Bank of Tanzania (BOT) 2024 public holidays document is hosted at a URL containing "2023" in the filename but contains 2024 holiday information.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_barbados.py:21-23
Timestamp: 2025-09-14T16:03:13.558Z
Learning: In tests/countries/test_barbados.py, using years_non_observed=range(2000, 2024) is intentional because all observed holiday examples fall within 2001-2023, making this range appropriate for limiting testing to years where observed holidays actually exist in the test data.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2944
File: holidays/countries/myanmar.py:183-191
Timestamp: 2025-09-17T15:16:16.192Z
Learning: The special_public_holidays formatting pattern in the holidays codebase follows a consistent convention: single entries per year use flat tuple format like `2024: (MONTH, DAY, name)`, while multiple entries per year use tuple-of-tuples format like `2024: ((MONTH, DAY, name), (MONTH, DAY, name))`. This pattern is used consistently across all countries.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2706
File: holidays/countries/cayman_islands.py:80-97
Timestamp: 2025-07-10T03:36:16.461Z
Learning: In the holidays library, date dictionaries that map years to specific dates (like queens_birthday_dates, spring_bank_dates, thanksgiving_day_dates, etc.) are typically defined within the _populate_public_holidays method rather than as module-level constants. This is the established library-wide pattern seen across multiple country implementations including United Kingdom, United States, Sri Lanka, and others.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2354
File: holidays/countries/fiji.py:185-188
Timestamp: 2025-03-19T16:53:00.375Z
Learning: In the Fiji holidays implementation, the `special_public_holidays_observed` dictionary in `FijiStaticHolidays` is only used for exceptions to the normal observance rules, not for documenting all holidays. Only 2019's Constitution Day needed a special entry as it didn't follow the standard patterns.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2821
File: holidays/countries/tanzania.py:37-83
Timestamp: 2025-08-15T19:16:14.119Z
Learning: In Tanzania holiday documentation, the Bank of Tanzania (BOT) may publish yearly public holidays PDFs using URLs with previous year filenames. For example, the 2024 public holidays document is accessible via a URL containing "2023 public holidays.pdf" but contains actual 2024 holiday information. Always check content rather than assuming filename indicates the year covered.

Learnt from: mbfarah
Repo: vacanza/holidays PR: 2798
File: holidays/countries/chile.py:278-281
Timestamp: 2025-08-12T03:21:09.116Z
Learning: In Chile holidays implementation, the general rule for September 17 (years >= 2007) uses MON_ONLY for years 2007-2016, meaning it only adds the holiday when September 17 falls on a Monday. For years when September 17 falls on other days and was declared a one-off holiday by specific laws, it must be added to the special_public_holidays dictionary.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 3026
File: holidays/countries/spain.py:189-189
Timestamp: 2025-10-28T17:26:45.090Z
Learning: In the vacanza/holidays codebase, `_populate` methods (such as `_populate_public_holidays`, `_populate_subdiv_holidays`, and subdivision-specific methods like `_populate_subdiv_XX_public_holidays`) intentionally do not include return type annotations like `-> None`. This is a consistent pattern across country implementations (e.g., Germany, United States, Spain) and should not be changed even when static analysis tools like Ruff suggest adding them.
<!-- </add_learning>

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2643
File: holidays/countries/mauritius.py:144-169
Timestamp: 2025-06-19T02:34:18.382Z
Learning: Custom holiday classes that extend _CustomHinduHolidays, _CustomIslamicHolidays, _CustomBuddhistHolidays, etc. in the holidays library do not use docstrings. They follow a pattern of using only inline comments above date dictionaries, as seen in Malaysia, Singapore, UAE, and other country implementations.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2530
File: tests/countries/test_andorra.py:23-28
Timestamp: 2025-05-06T21:07:11.577Z
Learning: In the holidays project, test methods for country holidays follow a standard form where year ranges are explicitly recreated in each test method rather than being stored as class variables, to maintain consistency across all country tests.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_colombia.py:45-61
Timestamp: 2025-09-20T15:37:21.301Z
Learning: In Colombia's holiday system, movable observed holidays were only introduced from 1984 onwards. Before this date, holidays that later became movable (like Saint Joseph's Day) existed as regular holidays from their introduction year, but had no observed variant system. The years_non_observed parameter in Colombia tests reflects this 1984 start date for the observed holiday system.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_indonesia.py:221-223
Timestamp: 2025-09-28T05:42:12.777Z
Learning: In tests/countries/test_indonesia.py, the manual set inclusion checks using get_named and years_found for Lunar New Year (test_lunar_new_year) and Vesak Day (test_vesak_day) are intentional and should remain until both holidays get their own `{insert}_no_estimated` flags implemented, rather than using standard harness assertions like assertHolidayName/assertNoHolidayName.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2416
File: tests/countries/test_turkmenistan.py:52-64
Timestamp: 2025-04-05T04:47:27.213Z
Learning: For holiday tests in the vacanza/holidays project, structure tests by individual holidays rather than by years. Each test method should focus on a specific holiday and test it across multiple years (from start_year through 2050) using helper methods like `assertHolidayName`. For fixed holidays, use generators like `(f"{year}-01-01" for year in range(1991, 2051))`. For movable holidays, specify individual dates for specific years followed by a range check.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_belgium.py:28-30
Timestamp: 2025-09-20T12:21:50.877Z
Learning: Belgium holidays implementation currently lacks a start_year attribute. In tests/countries/test_belgium.py, do not suggest adding test_no_holidays methods that rely on start_year until the start_year attribute is introduced to Belgium's holiday implementation.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2386
File: tests/countries/test_nepal.py:499-536
Timestamp: 2025-04-05T06:49:06.217Z
Learning: In the holidays project, test files follow a dual testing approach: individual methods test specific holidays across multiple years, while comprehensive year-specific tests (e.g., `test_2025`) verify all holidays for a specific year in a single assertion. Both approaches serve different testing purposes and complement each other.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2608
File: tests/countries/test_saint_vincent_and_the_grenadines.py:162-178
Timestamp: 2025-07-02T18:17:53.342Z
Learning: In the Saint Vincent and the Grenadines holidays implementation, New Year's Day is added without observed rules using `_add_new_years_day()` and should not include observed rule testing in its test method. Only holidays explicitly wrapped with `_add_observed()` have observed behavior.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_argentina.py:375-375
Timestamp: 2025-09-03T16:49:35.246Z
Learning: In the holidays library, national holiday tests use self.full_range (or similar comprehensive year ranges) even when explicit test dates only show modern observance. This is intentional for correctness and comprehensive coverage, unlike subdivision-specific holidays which have explicit year boundaries based on known start dates.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2398
File: holidays/countries/guinea.py:106-110
Timestamp: 2025-04-04T10:52:41.546Z
Learning: In the Guinea holidays implementation, observed Eid al-Fitr cases are properly covered by the test_eid_al_fitr_day() method, which tests both the regular holiday dates and the observed dates when the holiday falls on a non-working day (for years >= 2023).

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_iran.py:28-28
Timestamp: 2025-09-14T16:05:55.205Z
Learning: In tests/countries/test_iran.py, using years=(self.start_year - 1, 2102) in the no-holiday test is intentional because Iran uses the Persian Calendar which has specific supported year range constraints, and 2102 represents the upper limit of the Persian Calendar's supported range, not just an arbitrary far-future date.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_saint_helena_ascension_and_tristan_da_cunha.py:209-209
Timestamp: 2025-09-14T17:17:14.387Z
Learning: In tests/countries/test_saint_helena_ascension_and_tristan_da_cunha.py, the explicit loop iteration pattern for subdivision-specific holiday checks (like Anniversary Day for TA subdivision) is intentionally preferred over using assertSubdivTa helper methods, as confirmed by PPsyrius.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2829
File: tests/countries/test_canada.py:291-296
Timestamp: 2025-08-19T19:47:21.735Z
Learning: In the holidays library, HolidayBase objects automatically populate years on-demand when expand=True (the default). When checking dates from years not initially in the years range, those years are automatically populated via the logic at line 646 in holiday_base.py: "if self.expand and dt.year not in self.years:". This means tests can check dates outside the initial year range without needing separate holiday instances.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2820
File: holidays/countries/__init__.py:199-203
Timestamp: 2025-08-31T19:34:20.731Z
Learning: In the Saint Helena, Ascension and Tristan da Cunha implementation, there's a discrepancy between the registry.py entry (which references "HolidaysSH") and the actual implementation (which only defines SaintHelenaAscensionAndTristanDaCunha, SH, SHN, and SaintHelenaAscensionAndTristanDaCunhaStaticHolidays classes). The HolidaysSH class doesn't exist and according to the maintainer isn't needed.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2614
File: holidays/countries/guyana.py:78-90
Timestamp: 2025-06-13T12:18:03.539Z
Learning: The holidays codebase now uses the constructor signature pattern `__init__(self, *args, islamic_show_estimated: bool = True, **kwargs)` across country classes.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: holidays/countries/south_africa.py:163-170
Timestamp: 2025-09-14T06:39:08.485Z
Learning: In South Africa's holidays implementation (holidays/countries/south_africa.py), the 2021 election uses the literal "Municipal elections" instead of the local_elections constant ("Local Government Elections") - this inconsistency is intentional and should not be flagged as an issue.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2537
File: holidays/countries/finland.py:249-253
Timestamp: 2025-05-10T04:02:13.815Z
Learning: Holiday name comments directly above tr() function calls in the holidays package should only contain the holiday name itself (e.g., "# Independence Day.") without any additional context, dates, or historical information.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2537
File: holidays/countries/finland.py:0-0
Timestamp: 2025-05-10T04:32:15.760Z
Learning: In the holidays package, detailed historical context and additional information should be added as comments at the method level or above conditional blocks, while comments directly above tr() function calls should only contain the holiday name itself (e.g., "# Independence Day.").

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_argentina.py:765-766
Timestamp: 2025-09-03T17:08:59.893Z
Learning: The Anniversary of the Battle of Tucumán holiday in Argentina's Tucumán province (subdiv="T") has been in effect since at least 1946 according to official government documentation, which predates AR.start_year (1957). Therefore, using self.full_range for this holiday test is correct.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2881
File: tests/countries/test_indonesia.py:22-22
Timestamp: 2025-09-14T04:44:28.854Z
Learning: In Indonesia's holidays implementation, observed holidays are only available in years 2004 and 2020 due to presidential decrees, so years_non_observed=(2004, 2020) should be passed as a tuple of discrete years rather than a range.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2706
File: holidays/countries/cayman_islands.py:80-97
Timestamp: 2025-07-10T03:36:16.461Z
Learning: In the holidays library, date dictionaries that map years to specific dates (like queens_birthday_dates, special holiday dates, etc.) are typically defined within the _populate_public_holidays method rather than as module-level constants. This is the established library-wide pattern and should be maintained for consistency.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2323
File: holidays/countries/macau.py:407-461
Timestamp: 2025-03-04T11:32:45.095Z
Learning: In the holidays library, the standard approach for organizing static holidays is to use separate dictionaries for different categories (like `special_government_holidays`, `special_mandatory_holidays`, and `special_public_holidays`), which are utilized by syntactic sugar methods to pick up the appropriate holidays based on the selected category.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 3135
File: holidays/countries/united_states.py:1175-1178
Timestamp: 2025-12-15T22:50:33.654Z
Learning: In the holidays library (vacanza/holidays), for Puerto Rico and potentially other US territories, maintain the documented separation: place Spanish holiday name comments on one line, followed by a blank line, and then the English localization comment. Do not remove the blank line separator, as it documents the Spanish name (e.g., 'Día de la Abolición de la Esclavitud') while the English name below (e.g., 'Emancipation Day') is the actual localization.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2684
File: holidays/locale/it/LC_MESSAGES/SM.po:13-13
Timestamp: 2025-06-28T10:39:19.185Z
Learning: In the holidays project, .po file header comments use the format "# [Country] holidays." for default language files (without trailing hash) and "# [Country] holidays [locale] localization." for non-default language files (also without trailing hash).

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2623
File: holidays/countries/christmas_island.py:110-112
Timestamp: 2025-07-09T20:27:37.760Z
Learning: In Christmas Island, ANZAC Day (April 25) follows the same observed holiday rules as other holidays, using the SAT_SUN_TO_NEXT_MON rule to move to Monday when it falls on a weekend. The implementation correctly uses `_add_observed` wrapper around `_add_anzac_day`.

Learnt from: PPsyrius
Repo: vacanza/holidays PR: 2323
File: holidays/countries/macau.py:407-461
Timestamp: 2025-03-04T11:32:45.095Z
Learning: In the holidays library, the standard approach for organizing static holidays is to use separate dictionaries for different categories (`government`, `mandatory`, and `public`), which are utilized by syntactic sugar methods.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2398
File: holidays/countries/guinea.py:101-106
Timestamp: 2025-04-03T13:03:16.558Z
Learning: For Islamic holidays in Guinea like "Lendemain de la nuit Lailatoul Qadr" (Day after Night of Power) and "Lendemain de la nuit du Maoloud" (Day after Prophet's Birthday), the naming refers to the daylight hours following the night when these Islamic observances occur. Since in the Islamic calendar days begin at sunset rather than midnight, methods like `_add_laylat_al_qadr_day` and `_add_mawlid_day` correctly calculate these dates without requiring an additional day offset in the implementation.

Learnt from: KJhellico
Repo: vacanza/holidays PR: 2398
File: holidays/countries/guinea.py:101-106
Timestamp: 2025-04-03T13:03:16.558Z
Learning: For Islamic holidays in Guinea like "Lendemain de la nuit Lailatoul Qadr" (Day after Night of Power) and "Lendemain de la nuit du Maoloud" (Day after Prophet's Birthday), the naming refers to the daylight hours following the night when these Islamic observances occur. Since in the Islamic calendar days begin at sunset rather than midnight, methods like `_add_laylat_al_qadr_day` and `_add_mawlid_day` correctly calculate these dates without requiring an additional day offset in the implementation, following the same pattern as in the Ivory Coast implementation.