Has anyone noticed a mathematical symmetry regarding Beatles´ birthdates (J, P & G) ?

There are 113 days between Feb. 25th (George´s B-day) and June 18th (Paul´s B-day). Also 113 days between Paul´s B-day and John´s B-day (Oct. 9th).

Now based on some assumptions (not very accurate, I admit), let me do some calculations: a normal pregnancy time takes about 9 "moons" or nine 28-day periods, which add up to 252 days. So if someone wants an estimate of the day he/she was conceived (assuming regular years - 365 days - and everything else normal) then she/he just needs to add (365-252)= 113 days to her/his B-day and voilá !

Therefore, from my (not accurate, I own up) assumptions, one sees that George "would've been conceived" on Paul´s B-day and Paul "would've been conceived" on John´s B-day. Regardless of my forcing the point home and all inaccuracies, isn´t it still kind of mind-boggling ?