"Sun, 18 Aug 2024 15:24:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240818
Only TIME
15:24:21
General datetime
2024-08-18 15:24:21Z
For Database
2024-08-18 15:24:21
For HTTP1.1
Sun, 18 Aug 2024 15:24:21 GMT