AGE
Calculate age from birth date.
Calculate age gap between dates.
Calculate baby's age precisely.
Calculate exact chronological age.
Calculate lunar calendar age.
TIME
Add hours, minutes, and seconds.
Calculate hours duration.
Calculate time in hours and minutes.
Calculate minutes duration.
Calculate recurring events.
DATES
Add or subtract dates.
Calculate duration between dates.
Count days between dates.
Calculate months between dates.
Calculate expiration dates.
CALENDAR
Calendar date calculations.
Find day of week for date.
Calculate day number of year.
Check if year is leap year.
BUSINESS
Calculate working days.
Calculate vacation days.
Calculate project deadlines.
Calculate travel time.
HOLIDAYS
Calculate anniversary dates.
Days until Christmas.
Calculate Easter date.
HISTORY
Convert between BC and AD dates.
Convert to Mayan calendar.
Convert Mayan numerals.
SPECIAL
Track resolution progress.
Find palindrome dates.