Date formatting within the Clock Calendar format

[WinnerWind]

Is your feature request related to a problem?
I cannot remember the number associated with each month (January=1, February=2...) and it would be nice if, with my calendar, I could also see the associated month number.

Right now, my config for clock::calendar::format is:

 format : {
≫       "months":     "<span color='#ffead3'><b>{}</b></span>",
≫        days :        <span color='#ecc6d9'><b>{}</b></span> ,
≫        weeks :       <span color='#99ffdd'><b>W{}</b></span> ,
≫        weekdays :    <span color='#ffcc66'><b>{}</b></span> ,
≫        today :       <span color='#ff6699'><b><u>{}</u></b></span>
}

(Quotes may be missing due to formatting)

Describe the solution you'd like
Instead of {} in the clock::calendar::format dictionary, it could be modified to use {:%M (%m)} within the configuration

Describe alternatives you've considered
Other waybar plugins, but none of them had the stability requirements I wanted

Additional context
Clock.