Mine is definitely part of this list. I was not able to claim anything in February.
Along these lines, more or less every 6 years there will be one month with two claims (a 31-day month with a claim on the 1st and on the 31st) for each user. This should be quite rare, but with the amont of users claiming we may have a few of these every month.
@geekgirl: out of curiosity, could you please check how many of such cases we have?
Good idea. I will do that later.