does sumardagurrinfyrsti mean first day of summer in iceland?

Question

what is date in April of 1st day of summer in iceland

Answer 1

Yes, sumardagurinn fyrsti means the first day of summer. It's always on a Thursday, so it's not always on the same date. It's always sometime between April 19th and April 25th though, so it depends on which date between those is a Thursday each year.