the unlucky day is Friday the 13th
13th March 1957 was a Wednesday.
August 13, 1975, was a Wednesday.
It's June 13th, because Valentine's Day occurs just before February the 13th. At least, that's what I think, but you could also argue the opposite point, that February 13th is more unlucky than June 13th, because it occurs just after Valentine's Day (assummed to be lucky), therefore it must be unlucky. Hope this helps!
It was a Wednesday.
Wednesday
Wednesday.
Wednesday
Wednesday
The 13th
Friday is not considered an unlucky day by people in Christian countries. Some superstitious people consider Friday the 13th an unlucky day.
July 13th 1949 was a Wednesday.