Countdown by timeanddate.com

Main features:
• Fun themes
• Adjusts for all clock changes (DST) and timezones
• Notifications for events which will soon expire
• Count up, or down, from any point in time
• Share your countdown with friends

Upgrade features (In-App purchase):
• Use your own photos
• Remove advertising

The app only supports dates in the Gregorian calendar

timeanddate.com is an established company that first came online in 1998. We have more than a decade of experience as an accurate and reliable provider of time and date related information worldwide.