When I changed my username the last time, it said I could change it either once a month or once every thirty days, but I can't remember.

Can someone help me with this?

I'm relatively certain it's thirty days. Or maybe a one-month time frame? Either way, I'm certain it doesn't go by calendar months, if that's what you're asking.

You can only change your username once every month. I'm pretty sure it is 1 month, that's what it said when I changed mine this morning.