How are the bank ranges calculated?

More a quesition than a suggestion.

Today, I’ve earned 65,624 chips. Last week, I’ve earned 56,134 chips. Last month, I’ve earned -3,450 chips.

At least, that’s what the bank tells me.

From what I can tell, it seems like “Today” is really “In the previous 24 hrs”. While Last Week and Last Month are calendar defined as a Sunday-to-Sunday range, and a Calendar Month range.

I think? Is that correct?

I haven’t seen the “month” number change in a few weeks, so it doesn’t seem to be a “previous 4 weeks”.