"Sun, 18 Aug 2024 19:29:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
19:29:21
General datetime
2024-08-18 19:29:21Z
For Database
2024-08-18 19:29:21
For HTTP1.1
Sun, 18 Aug 2024 19:29:21 GMT