1QQQSpan

Make everyday date questions easier with an offline collection of practical calendar tools. Calculate a date interval Choose start and end dates, decide whether to include either boundary date, and see the total days, complete weeks with remaining days, and an elapsed years-months-days breakdown. The result explains which counting rule was used. Add or subtract time Move forward or backward by days, weeks, months, or years. When a target month is shorter than the starting date, the calculation uses the final day of that month and explains the adjustment. Count workdays your way Choose weekly rest days and maintain up to 100 custom rest dates or extra workdays. Counts use only the rules you configure; the app does not provide regional public-holiday data. Keep a personal timeline Save a title, date, optional tag and note, and choose a countdown or elapsed-time view. Dates can repeat monthly or yearly, and can be searched, filtered, hidden, archived, restored, or removed. Your home timeline highlights upcoming dates. Return to calculations Recent calculations can be reopened with their original inputs, removed individually, or cleared. History can also be turned off in preferences. Choose a date display format, week start, default interval boundaries, appearance, and text size. Two editable examples introduce boundary counting and month-end adjustments. A use guide explains the calculation rules, and a privacy statement describes local storage. All date calculations and saved information remain on this device. The app does not read your system calendar or contacts and does not rely on online holiday data.