"Sun, 15 Sep 2024 14:26:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
14:26:20
General datetime
2024-09-15 14:26:20Z
For Database
2024-09-15 14:26:20
For HTTP1.1
Sun, 15 Sep 2024 14:26:20 GMT