"When the days lengthen,
The colds strengthen."
Two German proverbial distiches, similar to the last, are given in Körte's Sprichwörter, p. 548.:
"Wenn de Dage fangt an to längen,
Fangt de Winter an to strengen."
"Wenn die Tage langen,
Kommt der Winter gegangen."
With the first set of rhymes, we may compare the following verses on washing on the successive days of the week, in Halliwell's Nursery Rhymes of England, p. 42. ed. 3.:
"They that wash on Monday
Have all the week to dry;