"Sun, 15 Dec 2024 23:59:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
23:59:49
General datetime
2024-12-15 23:59:49Z
For Database
2024-12-15 23:59:49
For HTTP1.1
Sun, 15 Dec 2024 23:59:49 GMT