This didn't quite get there, but maybe it can give ideas.
Basically, I put a line mark type in the table.
Please see workbook v10.5 attached in the Forum Thread.
276827line.twbx 957.2 KB
Thanks so much, this is great, however I cannot figure out why it is not working with me; after applying your suggestions:
1) the lines somehow doesn't cover the value of the first and the last column
2) Only "white" colors appear (ok, I changed to blue to highlight it better)
3) The values of the first and last day of the month are not in sync
Nevertheless I will keep working on your good suggestion, thanks again.
Apologies for delayed reply.
Glad you found the solution.
All the best.