"Sun, 19 May 2024 18:21:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240519
Only TIME
18:21:48
General datetime
2024-05-19 18:21:48Z
For Database
2024-05-19 18:21:48
For HTTP1.1
Sun, 19 May 2024 18:21:48 GMT