Talk:Mathematics of the Jewish Calendar/The recurrence period of the calendar

It is written "The last time that Rosh Hashana was not on the same day of the week as 247 years earlier was 5663 (1902CE) when it was Thursday not Saturday." This is a mistake, it should say "The last time that Rosh Hashana was not on the same day of the week as 247 years earlier was 5708 (1947CE) when it was Monday not Tuesday."

source
You didn't make this up out of your own head, I know, because I heard about it on some audio lectures done 20 years ago. SO GIVE THE SOURCE even if it is public domain. 100.15.117.207 (discuss) 18:32, 8 November 2017 (UTC)