This app allows you to check a date from the calendar X days ago or in the future, and determine the number of days between two selected dates. You can discover celebration dates or special events at a glance.

The summary of two modes:
Mode: Calculate the date X days ago or later
- Utilize this mode to determine the date that falls X days before or after a given start date, along with the corresponding day of the week.

Mode: Calculate the days between two dates
- Utilize this mode to calculate the precise number of years, months, weeks, and days between two specified dates.

The summary of features:
- Select a date from the calendar
- Date checker
- Day checker
- No special permissions are required
- No internet connection is needed
- Share results on social media (SNS) when connected to the internet
- User-friendly design
- Made in Japan
- Completely free

Experience the convenience of DayChecker, a free app that puts date checking at your fingertips. Have you ever wondered what date it will be 10,000 days after your birthday? DayChecker can provide the answer!