"Sun, 15 Sep 2024 18:20:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
18:20:11
General datetime
2024-09-15 18:20:11Z
For Database
2024-09-15 18:20:11
For HTTP1.1
Sun, 15 Sep 2024 18:20:11 GMT