Calculate exact age.
Add or subtract days/weeks/months.
What day was it?
Countdown to event.
Convert time units to hours.
Is it a leap year?
Convert to minutes.
Duration between two times.
Difference between dates.
ISO week number.
Years between dates.
End time.
Sum times.
Compare two.
Years passed.
Months/Weeks.
Years span.
Next birthday.
Work days.
Day of week.
Y-M-D.
Duration.
Day number.
Ordinal date.
Seconds lived.
Add.
Birth year.
Approximate.
Total minutes.
Months between.
Approx phase.
Check.
Subtract dur.
Solar conv.
Diff.
General add.
Between cities (hr).
HH:MM to Dec.
Total weeks.