How leather care due dates are worked out
A leather bag or a pair of shoes gets conditioned and then the date disappears from memory. This tool takes the last conditioned date and the interval you set for each piece, returns the next due date and the days left, and shows which item comes due first, which has gone longest since it was last done, and how many sessions a year the whole set adds up to.
How the math runs
The next due date is the last conditioned date plus the interval in months. Dates are built from year, month and day components separately, so month ends and leap years hold: a day that does not exist in the target month moves to that month's last day. Sessions per year is 12 divided by the interval, shown to one decimal. A last conditioned date later than the reference date is blocked with a message. Figures are current as of October 2026.
Limits and disclaimer
No officially recommended interval, product type, or storage temperature and humidity is offered here. Figures circulating in this area are common practice rather than a published standard, and none has been confirmed in authoritative sources. Set the interval yourself. The tool does not assess the condition of the leather or produce a score — it counts dates and sessions. Follow the product sheet and the manufacturer's guidance first.
Frequently asked questions
No officially recommended interval is offered here. Intervals circulate widely but are common practice rather than a published standard, and they shift with the type of leather and how often it is used. Set the interval yourself.
February has no 31st, so the date moves to the last day of that month: 29 February in a leap year and 28 February otherwise.
No. Product types and storage temperature or humidity are left out because no authoritative source has been confirmed for them. Follow the product sheet and the manufacturer's guidance first.