How Many Days Have Passed Since Jan 1 2024. Time difference calculator and free online date & time calculator that lets you calculate the time duration of any date/time period. You can also use this tool to determine how many days have passed since your birthday, or measure the amount of time until your baby's due.

Just enter the start date and end date in mm/dd/yyyy format or you can use the datepicker to select the date. Free day counter to calculate the number of days between two dates, including the number of working days, weekends, and holidays.