"Fri, 21 Jun 2024 13:21:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240621
Only TIME
13:21:03
General datetime
2024-06-21 13:21:03Z
For Database
2024-06-21 13:21:03
For HTTP1.1
Fri, 21 Jun 2024 13:21:03 GMT