As Salamu Alaikum wa Rahmatullahi wa Barakatuhu I know we can send Ramadan Mubarak and Eid Mubarak greetings to each other, can we send Jumu’ah Mubarak greetings to families and friends since Jumu'ah is a very special day. I normally receive and send out sms for Jumu'ah and was wondering if that is okay. Jazakallahu Khairan May Allah Subhanahu wa Ta’ala reward you for your efforts Ameen! Wa Alaikum Salam wa Rahmatullahi wa Barakatuhu

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

We are not aware of any evidence reported from the Prophet, sallallaahu ‘alayhi wa sallam, or his companions that it is a Sunnah for Muslims to regularly exchange "Jumu‘ah Mubaarak" greetings, nor do we know of any scholars that made it permissible. Taking this into consideration, to do so regularly is a religious innovation, especially if it is done as an act of worship, and believing that it is a Sunnah. It is proven that the Messenger of Allaah, sallallaahu ‘alayhi wa sallam,  said: "Whoever does an act that does not comply with our matter (religion), will have it rejected." [Muslim] In another wording: "Whoever introduces into this matter of ours (Islam) that which is not part of it, it will be rejected." [Al-Bukhari and Muslim]

However, if a Muslim says this to his Muslim brother from time to time, without thinking it to be an established Sunnah or binding, and without doing it on a regular basis, but just by way of supplication, then we hope that it is permissible; although leaving it is preferable so that it does not become like the established Sunnah.

Allaah Knows best.