as of right now, when you go to set a time that is in the past, it clears the time you intend to set (ex: a scheduled send for 8:00 am at the time 10:00 am and it clears the 8:00) the normal intent is to send it the next day, more along the lines of "its too late for me to be texting this person how about tomorow" and I suggest that instead of default clearing, you default to the next date for that time (ex: a scheduled send for 8:00 am at 10:00 am defaults to 8:00 am the next day). Of course you would still have the ability to change the date, but most messages are scheduled < 24 hrs in advance and that is why I think it should be the default. (also for when you think u scheduled it but it didnt stay so u accidently text somebody at a time you dont want to start a conversation)