"Sun, 15 Sep 2024 15:31:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
15:31:15
General datetime
2024-09-15 15:31:15Z
For Database
2024-09-15 15:31:15
For HTTP1.1
Sun, 15 Sep 2024 15:31:15 GMT