"Sun, 15 Sep 2024 15:06:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240915
Only TIME
15:06:21
General datetime
2024-09-15 15:06:21Z
For Database
2024-09-15 15:06:21
For HTTP1.1
Sun, 15 Sep 2024 15:06:21 GMT