Tejarat Cal can be used for managing meetings, personal events and schedules, sync with your existing calendars(Google Calendars for example), convert gregorain, jalali and qamari dates, view official events of Iran based on geophysic institute.
Important note: qamari dates and conversions are based on standard calendar which can have 1 day difference with Iran official qamari calendar, but all qamari dates of the persian year 1395 is manually synced with Iran official calendar.