"Fri, 21 Jun 2024 09:40:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240621
Only TIME
09:40:40
General datetime
2024-06-21 09:40:40Z
For Database
2024-06-21 09:40:40
For HTTP1.1
Fri, 21 Jun 2024 09:40:40 GMT