Is it allowed to say "Jummah Mubarak"?

"When you are greeted with a greeting, greet in return with what is better than it, or (at least) return it equally. Certainly, Allâh is Ever a Careful Account Taker of all things" (An-Nisa 4:86)

In recent times it has been observed that, some sects have put the fatwa of Bidaah on people who say "Jummah Mubarak". This shows the ignorance of the people who are not aware of the basic knowledge. Let us first see the Hadith where it is mentioned "Jummah is Eid"

قَرَأَ ابْنُ عَبَّاسٍ{ الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي وَرَضِيتُ لَكُمْ الْإِسْلَامَ دِينًا }وَعِنْدَهُ يَهُودِيٌّ فَقَالَ لَوْ أُنْزِلَتْ هَذِهِ عَلَيْنَا لَاتَّخَذْنَا يَوْمَهَا عِيدًا قَالَ ابْنُ عَبَّاسٍ فَإِنَّهَا نَزَلَتْ فِي يَوْمِ عِيدٍ فِي يَوْمِ جُمْعَةٍ وَيَوْمِ عَرَفَةَ

Translation: A Jew who was with Ibn Abbas RadhiyAllahu Anhu when he recited, "Today I have perfected for you your religion..." (5:3) remarked, "If this verse had been revealed to us we would have made it a festival." Ibn Abbas RadhiyAllahu Anhu replied, "It was revealed on a day which contained two festivals (Eids), on Friday and on the day of Arafah."

Reference: Sunan Tirmidhi 50- BOOK OF EXEGESIS OF THE QUR’AN Chapter 6 About surah al-Maidah, Hadith No 415

​So it very clear now that Friday is also Eid for Mu'min and everyone say Eid Mubarak on Eid day. Hence Jummah Mubarak

Now let us see what scholars have said in this regard:

* Imam Mullah Ali Qari (RadhiyAllahu Anhu) said:

تأليف متنه في يوم الجمعة المبارك

Translation: Written the content on "JUMMAH TUL MUBARAK" [Maraqi al-Falah (1/381)]

* Imam Badr-ud-din Ayni (RadhiyAllahu Anhu) said:

صباح يوم الجمعة المبارك

Translation: The morning of "JUMMAH TUL MUBARAK" [aqd al Jamaan]