"Wed, 14 Jan 1970 07:56:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
07:56:46
General datetime
1970-01-14 07:56:46Z
For Database
1970-01-14 07:56:46
For HTTP1.1
Wed, 14 Jan 1970 07:56:46 GMT