Handling date-times is a painful act because of the sheer endless amount of formats used by people. Luckily there are a couple of specified standards out there like ISO 8601. But even ISO 8601 leaves ...

Calculate week and month in a easy way. Normally we want to use these binate date in script, from Monday to next Monday which means 00:00:00-23:59:59, and Month from 1st to next 1st in the same way, ...