Find which calendar quarter (Q1-Q4) any date falls in.
Find out how many days have passed since any past date.
Find the ISO-8601 week number for any date.
Find a date's ordinal day number within its calendar year.
Add a number of business days to a date, skipping weekends.
Check if a year is a leap year, and list leap years in a range.
Add or subtract days, weeks, months, or years from any date.
Count exactly how many days remain until a future date.
Count the weekdays between two dates, excluding weekends.
Find out which day of the week any date falls on.