23 could refer to your place in the rankings, your horse's ranking, your ec ranking, or something else entirely. In what context exactly? I need a little more information to answer you.
On Howrse NIB stands for Non inbred
Howrse has a page for people's birthdays. Click on one of them and then you click congratulate.
you have to congratulate someone on there birthday :)
you dont really do anything but wait until it is 6:23 you cant change the time on howrse.
Congratuate a player on their birthday. Hope that helps! :)
It doesn't mean anything really. It's just an objective Howrse makes you do.
That's impossible to answer without knowing your personal timezone. GMT time zone conversions are easily accessible on google, or you can look at the clock on howrse and work it out.
The GMT clock is not broken. Just keep breeding your unis at 6:23 GMT on Howrse.
If you mean Wandering Horse's then you wait for howrse to release them, then complete the objectives that come with them!
Artificial Insemination
the size of the picture
the 4th of March at 23:00 Game time