Siri hard codes this afternoon to mean literally right after 12 PM. So if at 1pm you ask it to remind you to do something this afternoon, it will put it at 12:0

Siri hard codes this afternoon to mean literally right after 12 PM. So if at 1pm you ask it to remind you to do something this afternoon, it will put it at 12:00pm the following day. I just double checked it right now. It’s currently 12:18 PM, and I asked Siri “remind me to test this in the afternoon“ and it set a reminder for tomorrow at 12:00 PM