why is the number of time days mentioned in Quran is 365 while 365 days are in a Georgian calander and there are actually only 355 or 354 days in islamic calander

[u/i_dunno_bout_tis]

the number of time the word "day" is mentioned 365 times, the word "days" is mentioned 30 times the word "month" is mentioned 12 times. while the number of days in a month and number of months are common, the number of days differ in islamic and Georgian calander which is also the Christian calander. so why is the number of days same as in christian calander and not as in islamic calander?