"Sat, 21 Sep 2024 15:35:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:35:21
General datetime
2024-09-21 15:35:21Z
For Database
2024-09-21 15:35:21
For HTTP1.1
Sat, 21 Sep 2024 15:35:21 GMT