"Sat, 21 Sep 2024 18:49:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
18:49:20
General datetime
2024-09-21 18:49:20Z
For Database
2024-09-21 18:49:20
For HTTP1.1
Sat, 21 Sep 2024 18:49:20 GMT