Time Zones and Dates

Exact age in years, months and days from a birth date as of a date, plus next birthday and days until it.

Add business days to a date or count the business days between two dates, Monday-Friday, skipping holidays you list.

Daylight saving transitions of an IANA time zone in a year: exact UTC instants, offsets before and after, and the clock change.

Find the meeting hours where everyone is within working hours across up to 6 time zones on a date, with local times.

Convert a date and time from one IANA time zone to another, flagging times that do not exist or occur twice at DST changes.

Current date and time in an IANA time zone, with UTC offset, abbreviation and whether daylight saving time is in effect.