"Sun, 15 Sep 2024 12:23:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
12:23:21
General datetime
2024-09-15 12:23:21Z
For Database
2024-09-15 12:23:21
For HTTP1.1
Sun, 15 Sep 2024 12:23:21 GMT