When looking at Lunar eclipse (which occurs when the Moon moves into the Earth's shadow) series sets from 19371940, there was a total ascending node on May 14, 1938, and May 3, 1939 and there were penumbral ascending nodes May 25, 1937 and April 22, 1940.
A lunar eclipse occurs when the Moon moves into the Earth's shadow. Lunar eclipse series sets from 19371940 Total 1938 May 14 Total 1939 May 03 Penumbral 1937 May 25 Penumbral 1940 Apr 22 Saros 
