"Sat, 18 May 2024 20:19:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
20:19:31
General datetime
2024-05-18 20:19:31Z
For Database
2024-05-18 20:19:31
For HTTP1.1
Sat, 18 May 2024 20:19:31 GMT