I have some questions from your honors:
1. What is the desired calendar by Imam Mahdi (may our souls being sacrificed for him)? Lunar or solar?
2. Is the origin of the lunar calendar, which is the immigration of the God’s Messenger, confirmed by his Excellency?
3. Is the beginning of the lunar year, which is the first day of Muharram, approved by his Excellency?
Thank you for your kindness in answering my questions.