"Thu, 29 Jan 1970 14:56:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
14:56:51
General datetime
1970-01-29 14:56:51Z
For Database
1970-01-29 14:56:51
For HTTP1.1
Thu, 29 Jan 1970 14:56:51 GMT