Find out if any past, present, or future year has 366 days, and understand the mathematical rules behind it.
Leap years generally happen once every 4 years. Here is a list of recent and upcoming leap years:
Calculate total days, working days, and weekends between two dates.
Compute business working days and hours between dates.
Create a custom countdown timer for holidays or events.
Generate and customize printable calendar PDFs.
Convert Gregorian dates to Julian day numbers.