The Solar year was created by Hashem. On the other hand, the idea of referring to March as the third month of the year can be problematic according to a Ramban in Parshas Bo which I learned many moons ago.
I don’t think there is any signifigance to the way the months are split up, so the fact that it’s the 14th day of the month is meaningless as far as I know (although not problematic the way the third month is). But I could be wrong.