Hi Jean, can I ask were do you get this data from? I have two charts, especially one, where I would really like to know if there was summer time, one is 1972 September 6, Hungary, and the other one is 1978 April 16 Romania. I'm asking this because I looked through Wikipedia pages and the data I found is very conflicting. Both of these charts depend on an official record from the hospital, so whether on not there was a summer time in these years in these countries matters a lot.
Thanks in advance. I just hate uncertainty, lol.