Hi, I think this is more of a JS question than a SS question. I want to check if today is the last day of the month, can I trust JS on that?

No more or less than any other language? Why couldn't you trust it? A date-focused library like momentjs or alternatives will make it easy to read and write

I don't know, I just feel dealing with dates is scary 🙂 Will try to use momentjs, thanks.

Dates and clocks are absolutely scary, but I'm not convinced that's unique to JS