"Thu, 15 Jan 1970 21:43:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
21:43:26
General datetime
1970-01-15 21:43:26Z
For Database
1970-01-15 21:43:26
For HTTP1.1
Thu, 15 Jan 1970 21:43:26 GMT