Use APKPure App
Get Date Calculator add to or subtract from a date old version APK for Android
Ajouter ou soustraire des jours ou une durée (année, mois, jours, semaine) à n'importe quelle date
This is a very simple date calculator app. It simply adds or subtract days or any duration (year, month, days, weeks). You can auto input current date. You can choose any one of three date format dd/mm/yyyy, mm/dd/yyyy, yyyy/mm/dd. This app has a ad-free paid version too.