The Zeroth of March
If I referred to a date as “zeroth of March”, I bet it would make perfect sense for some but no sense for others. Dates are just arbitrary numbers assigned to each day. That’s not to say that there is no logic within them. Months are sometimes 30 days long, sometimes 31, and 28 once, except 29 every so often. However, within a particular month, adding one to today’s date is still, thankfully, tomorrow’s date.