Hi at 68 I’m not to clever with things like Excel unless quite basic. My problem at the moment living in my motorhome and based a lot of the time in Napier, NZ for part time work. Napier only allow you to stay in the 4 designated freedom camping sites for 2 consecutive days and any 10 days in a rolling 30 day period. I have tried everywhere to find a rolling calendar to track my 10 days (which are never 10 days consecutive) in a 30 day period. Can someone please help.