Date difference calculator
Calculate the signed number of days between calendar dates.
Open toolDate & time
Convert Unix seconds or milliseconds and ISO 8601 instants.
Convert Unix seconds or milliseconds and ISO 8601 instants.
Calculate the signed number of days between calendar dates.
Open toolAdd calendar months and days, clamping month-end dates when needed.
Open toolCount weekdays between two dates, excluding an optional holiday list.
Open toolCalculate completed years, months and days between two dates.
Open tool