When adding a label, the system put the current year in the field of "Year of issue". Quite often this is wrong and the labels is much older. Not many of us adding a label overwrite the default.
So I added a flag "checked year of issue", the field is checked when (I/we) are quite sure, it is correct. So far this field is only visibile for our power user like Peter and Žan so the majority of our collectors do not see too many confusing fields when editing a label.
When you like to help to check and to verify the year of issue, please do it!