What is implemented:

• constructors
  dateTime(string) -  string is standardized format of date-time (ISO 8601)
  duration(string) - string is subset of standardized format of duration (ISO 8601)
  • allowed designators: D, T, H, M, S
  • only natural numbers are allowed
• functions - below

Examples:
dateTime("1997-07-16T19:20")
duration("P5D1H3S")

Functions

• arithmetic operations
  • +(DateTime,Duration) - adds Duration to DateTime and returns the sum as a new DateTime (commutative)
  • -(DateTime,Duration) - subtracts Duration from DateTime and returns the difference as a new DateTime 
  • +(Duration,Duration) - adds two Durations and returns the sum as a new Duration (commutative)
  • -(Duration,Duration) - subtracts two Durations and returns the difference as a new Duration
  • *(Duration,Integer) - multiplies Duration by the given Number and returns the result as a new Duration (commutative)
  • -(Duration) - negates Duration and returns it as a new Duration
  • /(Duration,Integer) - divides Duration by the given number and returns the truncated result as a new Duration
• relational operations
  • <,<=,==,!=,>=,>(DateTime,DateTime) - compares two DateTimes, returns boolean
  • <,<=,==,!=,>=,>(Duration,Duration) - compares two Durations, returns boolean
  • all comparisons are independent of whether the time is in UTC or in the local time zone.
• now() - returns DateTime with current date and time in the local time zone
• nowInUtc() - returns DateTime with current date and time in the UTC time zone
• diffDateTime(DateTime, DateTime) - returns difference between two DateTimes as an Duration in absolute value
• durationInHours(Duration) - returns the Integer which represents the number of whole hours spanned by this Duration
• durationInDays(Duration) - returns the Integer which represents the number of whole days spanned by this Duration
• durationInMinutes(Duration) - returns the Integer which represents the number of whole minutes spanned by this Duration
• durationInSeconds(Duration) - returns the Integer which represents the number of whole seconds spanned by this Duration