Epoch time converter

This program converts epoch(unix) time and milliseconds to date time.

After entering epoch time, you can convert it to the time of the current LOCAL environment and the time of the GMT environment by clicking convert.

If you convert by selecting a date and time, convert it to the specified time.

It automatically checks the start and end times according to the converted year, month, week, date converts them to epoch time.

It provides useful functions to developers.