Absolute Ring Event

If it's just one big deadline for all 3 rings, then yes, you can miss up to 5 days. If it's 3 separate deadlines, each for each ring, then no, you've already failed your chances with the first ring. I'm not really sure how it works but judging by the way the Attendance Stamp page is laid out, I'm leaning more on the latter.

Details:

This powerful ring has the combined stats of all three Evolving rings. There are three different phases, in which you will receive a ring and be able to upgrade it. Check out the details below!

You have now upgraded your ring! You can repeat this once per day ten more times in that phase order to max out your new ring. You must also repeat these steps for each Phase.