I want to ask one small question about the leaderboard

Hello Shahjahan Jewel i want to ask one small question about the leaderboard. does the ranking of the last 30 days reset each month or does it keep stacking the points. for example if in the last 30 days a user is first in the leaderboard with 120 points. when the month ends does those points reset or do they keep those 120 points. i am only asking for the last 30 days. thanks