Hello,
thank You for Your answer

Yes, I know that this is impossible in actual version of GRIDBOX, but I'm sugesting it very much because:
1) There are several different EVENTS with event dates who are visible correctly in calendar, for example: 1.04, 3.04, 10.04, 14.04, 20.04 - calendar view is perfect
2) ...but - while using 'next and previous' module- these events are sorted with dates of publishing, not with the event dates, so for example 'next and previous' works like this:
10.04 <-> 20.04 <-> 1.04 <-> 14.04 <-> 3.04 - which totally doesn't make sense at all
So, I hope - You could change it in the next GRIDBOX versions
I really, really would love GRIDBOX to beat jEvents. Sorting with event dates would be a great step forward

Crossing fingers for this possibility
All the best,
Kamil