"Sun, 15 Sep 2024 16:16:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
16:16:20
General datetime
2024-09-15 16:16:20Z
For Database
2024-09-15 16:16:20
For HTTP1.1
Sun, 15 Sep 2024 16:16:20 GMT