"Fri, 21 Jun 2024 21:16:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240621
Only TIME
21:16:16
General datetime
2024-06-21 21:16:16Z
For Database
2024-06-21 21:16:16
For HTTP1.1
Fri, 21 Jun 2024 21:16:16 GMT