January

January is the first month of the year in the Julian and Gregorian calendars. Its length is 31 days.
The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere and the warmest month of the year within most of the Southern Hemisphere. In the Southern hemisphere,
January is the seasonal equivalent of July in the Northern hemisphere and vice versa.

March

March is the third month of the year in the Gregorian calendar.
It is the first month of spring in the Northern Hemisphere and the first month of autumn in the Southern Hemisphere

August

It’s the sixth month of the ancient Roman calendar used by the Roman kingdom and republic.
Back then, the month of August was known as Sextilus, Latin for “sixth month.”

December

The twelfth month of the year Etymology Middle English Decembre, December "last month of the year," from early French decembre (same meaning), from Latin December, literally, "tenth month," from decem "ten" — related to decimal,
dime Word Origin In the first calendar used by the ancient Romans, the year began with the month of March.