[HiIAmIlNano]

If I am not wrong this holds true for the switch from Julian calendar to the Gregorian one. Some months were shortened to be synchronised with the new system. And if I am not mistaken Jewish and Arabs do not use the same systems we use for months and years

[defrost]

For an added twist this changeover occurred in different years, at different times in different countries .. and not always with the same number of days difference.

Good Times.

[Ekaros]

And even more good times. It seems sometimes some countries went back to Julian...