Talk:Game Updates/@comment-5312616-20160920195933/@comment-5955047-20160921031323

The update FAQ page

https://support.backflipstudios.com/hc/en-us/articles/227826428-DragonVale-3-9-0-Update-FAQ

confirms that there's a new gem reset time:

"The gems you can give to your friends now reset daily at 11am MST. Once you've given out all your gems for the day you will not be able to give any more until 11am MST on the following day."