The Eid prayer The Eid prayer is a collective duty, which means that when some Muslims offer it, the rest are not accountablefor their omission 

Embrace the tranquility of Ramadan Embrace the tranquility of Ramadan with I'tikaf, a beautiful Sunnah of the Prophet (pbuh). Dedicate the last 10 nights to worship in the mosque, seeking closeness to Allah. Itikaf Night Of Power

What is I'tikaf?I'tikaf is an Islamic practice of dedicating oneself to worship Allah by staying in seclusion in a mosque, particularly during the last 10 days of Ramadan, for the purpose of worship and seeking the Night of Power.

It is permissible to offer the greeting of peace to a group of people that includes some Muslims, but he should mean to direct his greeting to the Muslims. This is stated by Ibn Hajar and endorsed by Shaikh Abdullah ibn Jibreen.

FATAWA ON CONTEMPORARY ISSUES - (PART TWO)