Based on few event, they always have 2 monthly.
Just expect some bonus monthly in 25th. It's already no suprise anymore cause is based on few years christmast they always do 2 bonus monthly no matter whats. I think in previous years they havign post monthly as well.
As far as I remember double monthly only happens on birthday celebrations or another scenario monthly bonus is distributed on January 1 while January 15 there is no monthly bonus which means no double monthly bonus just a change in schedule but yeah I hope i'm wrong because there is no reason for us to refuse the bonus

As what was informed by Mahdirakib as in this
post, there were double monthly bonus in the last 3 Years on December (2022-2024).
Lemme compile the post my Mahdirakib to make it easier for us to know the last 3 years of Christmas celebration in Stake:
2022: Monthly (1st December), post-monthly (13th December), second monthly (26th December).
2023: Monthly (1st December), post-monthly (11th December), second monthly (26th December).
2024: Monthly (1st December), post-monthly (12th December), second monthly (25th December).
2025: Monthly (1st December), post-monthly (15th December), second monthly.........??
Looking at what happened on 2022-2024 compared to what happened this month so far, there is a big chance for us to get 2nd monthly bonus.
However, as usual, there is no guarantee that we will get it as what we got in the last 3 years but at least there is a chance LOL.