Probably the best Persian calendar/organizer solution for Android users. If are aware of any better please share it with us!
Persian and Gregorian Calendar
Just like what you're used to in a paper calendar, this app provides Gregorian calendar alongside Persian (Iranian) calendar. In all four views of the app (monthly, weekly, daily, and agenda view) you can see dates in both calendar systems, so that you won't have to use two separate apps at the same time.
Compatible with Google Calendar
Unlike other available apps, this app is based on the original Android calendar application and gives you all of its features, including syncing with Google Calendar. You can even add or edit events by Iranian dates and see them syncing with Google Calendar.
Holidays and Public Events
You have all the national holidays in your calendar app to help you organize your schedule more easily. A quick look at weekly and monthly views shows you all the upcoming holidays nicely highlighted with color red. In day view you can also see public events of Iran.
An advanced widget with both Persian and Georgian calendar dates is now available. A plus button helps you to quickly add events to your Google calendar. To add the widget you have to long press on home screen and choose Persian Calendar.
Important You need a Google account to use this application.