"Sun, 15 Dec 2024 23:25:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
23:25:21
General datetime
2024-12-15 23:25:21Z
For Database
2024-12-15 23:25:21
For HTTP1.1
Sun, 15 Dec 2024 23:25:21 GMT