Another very warm, practically hot day. Sure, you can use the air conditioner in your car on days like today, but when I was driving along around 1 p.m., I kept the windows down and blasted myself with warm air. Pretty soon driving will be complicated by snow and ice, so I want to feel the warmth, even the sweaty heat, right now.

Ah, these warm days of September. Makes you think about the Sitzkrieg, doesn’t it? No? I might not have either, but not long ago I happened across the bilingual “On ira pendre notre linge sur le ligne Siegfried” (“I’m Going to Hang Out the Washing on the Siegfried Line”), a song I wasn’t familiar with. I like finding moment-specific songs — in this case, the Sitzkrieg — that have been lost to time. (Like this one and this one.)

This version was by French band leader Ray Ventura. Irish songwriter Jimmy Kennedy wrote it. His 1984 NYT obituary noted that “Mr. Kennedy’s songwriting career spanned 50 years. His familiar songs included ‘The Hokey-Cokey’ (which was popular as the Hokey-Pokey dance in the United States) ‘Teddy Bear’s Picnic’ and ‘I’m Going to Hang Out the Washing on the Siegfried Line.’ ”

Odd to think that someone actually wrote “The Hokey-Pokey” and “Teddy Bear’s Picnic,” (Bears’?) though of course someone did. Someone named Jimmy. Songs like that just seem to emerge from the woodwork.