"Thu, 29 Jan 1970 12:52:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
12:52:37
General datetime
1970-01-29 12:52:37Z
For Database
1970-01-29 12:52:37
For HTTP1.1
Thu, 29 Jan 1970 12:52:37 GMT