1950s/60s English comedy duo Flanders and Swan wrote a brief ditty that went:

January brings the snow/makes your feet and fingers glow.

February's ice and sleet/freeze the toes right off your feet.

Welcome March with wintry wind/Would thou wert not so unkind!

April brings the sweet spring showers/Going on for hours and hours

Farmers fear unkindly May/Frost by night and hail by day

June just rais and never stops/Thirty days and spoils the crops!

[July?]

[August?]

[September?]

[?] October's rain and fog/Would not do it to a dog!

Bleak November's [?] and mud/Is enough to chill the blood

Freezing cold December then/Bloody January again!

On the issue of date statistics, has anyone thought about rhymes and scansion? Probably not an issue, but perhaps "On the first day of . . ." just sounds better than "on the seventh day of. . ." (Not all songwriters resort to this convenience: Ewen MacColl's Ballad of Springhill says,

In the town of Springhill, Nova Scotia Late in the year of fift-eight; Day still comes and the sun still shines But it's dark as a grave in the Cumberland Mine.

1958 was, of course the great Springhill Mine Disaster, but the temptation to say "fifty-nine" to make it rhyme must have been intense.