My suggestion is for you to use the timezone we have set up in our forum profile and expire the cards based on that. I'd like my cards to expire at night so when I wake up, my fresh ones are there waiting for review. My mind is clear in the morning and I can pump through the review before work, then in my free time during the day, do new kanji.

As it stands, I spend a good amount of time on new kanji, then sometime in the afternoon, I get expired cards that I want to take care of right away. Not such a big deal,  and I COULD wait until the next day, but it'd still be a nice personal touch if during OUR night is when the day switched over, and I just hate when there are orange cards so I gotta sit down and do them.

Your script probably uses cron already, so just run it hourly instead of daily and base it on the timezone set in our settings. Now that I think about it, it is probably a fairly minor change if your script is anything like I imagine.