Love a fictional calendar that both makes more sense than our actual one (easy for player time tracking) but also has a nice dash of fantastical strangeness to it. Glimmers are an excellent idea.
I'm a bit puzzled about the bead placement on the example as compared to what's written down, and would've liked some examples of seasonal glimmers in the extra space available—but this is a very fun tool! I'll definitely keep it in my pocket for the future.