"Sun, 15 Sep 2024 18:04:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
18:04:21
General datetime
2024-09-15 18:04:21Z
For Database
2024-09-15 18:04:21
For HTTP1.1
Sun, 15 Sep 2024 18:04:21 GMT