Please state in which country your phrase tends to be used, what the phrase is, and what it should be.
Example:
In America, recently came across “back-petal”, instead of back-pedal. Also, still hearing “for all intensive purposes” instead of “for all intents and purposes”.
IIRC it was July and August, them being added to the calendar messed up the months, so January and February are innocent.
Damn Julius and Augustus!
Actually January and February were added to the end of the calendar. Used to be March was the first of the year. Which is why Sept (month 7) through December (month 10) are months 7-10 after March.
December was the last month of the year and then there was just this empty time from December through March, they didn’t have a month for it because they were agrarian and that time they didn’t really do anything anyway. March being the start of spring, being the logical time to start a new year for them.
Later they added January and February. Which is why February has a short month, it was the last of the year, a logical place to have an odd number of days month.
At some point someone decided January should be the first of the year and then moved it. I forget when that happened.