Bearuk wrote:1/5 to 5/5
1,2,3,4,5
= 5 days
Bearuk wrote:8/5 to 15/5
8,9,10,11,12,13,14,15
= 8 days
5+8
= 13 days total
Any day counts per calendar day, not per 24 hour interval.
This is a typical issuing mistake due to the absurd practice by some (Schengen-)states to issue a visa for the EXACT days you plan to stay.
Whenever the consular official does his maths wrong, you end up with a worthless visa.
I personally had the same experience in Iran: I wanted to stay from Thursday to Thursday (=8 days), but the Iranian official in Dublin issued 7 days. Ironically I even asked about that, and he said "that´s OK"... Well, it wasn´t.
The US, Canada, Australia, but even China and India are easier: I just applied for a Chinese multi-entry, and filled "maximum days spent consecutively in China" as "7" (seven). They just gave me 30 (thirty) PER STAY without any further hassle.
The Schengen-system sounds great in theory, the practical management is worse than third-world...