date time calculator

Calculate the download time of a file depended on file's size

Calculate age from given birth date or difference between two dates.

Time calculator and spreadsheet, graph, saving and export to csv, MySQL and HTML

Time zone calculator with DST support

Detailed calculation of time interval between two dates, date navigation

This helper returns the date (and possibly the time) formatted the way you want.

Convert the current date and time to MySQL datetime format using PHP's date.

Menstrual Cycle Calendar and Due-Date Calculator - Free Desktop PC Version.

Helps you convert the text format cells to date&time format cells.

The program will calculate the Long Count Date.