parse_datetime for post within 24 hour

[Raymondkltse]

the code look for the aabr element inside a post/comment. somehow for post recently added (within 24 hour) the aabr shown as example: 1 hour ago 34 minutes ago 20 hrs

there is a missing ago in the last example, and also the parse_datetime would do the 1 hour ago by assuming now at today midnight.