The culture of the Assyrians is both distinct from those of neighbouring ethnic groups as well as ancient. Many Assyrians (estimates of fluent speakers range from 500,000) still speak, read and write various Akkadian-influenced dialects of Eastern Aramaic, labelled by linguists as Northeastern Neo-Aramaic and Central Neo-Aramaic. They are predominantly adherents of several denominations of Syriac Christianity, notably the Ancient Church of the East, the Assyrian Church of the East, the Chaldean Catholic Church, the Syriac Catholic Church and the Syriac Orthodox Church. Some are followers of the Assyrian Pentecostal Church and Assyrian Evangelical Church. A minority are secular or irreligious. Assyrians celebrate many different kinds of traditions within their communities, with the majority of Assyrian traditions being tied to Christianity. A number include feast days (Syriac: hareh) for different patron saints, the Rogation of the Ninevites (ܒܥܘܬܐ ܕܢܝܢܘܝ̈ܐ, Baʿutha d-Ninwaye), Ascension Day (Kalo d-Sulaqa), and the most popular, the Kha b-Nisan (ܚܕ ܒܢܝܣܢ, 'First of April'). Some of these traditions have been practised by the Assyrians for well over 1,500 years. Simele massacre The Simele massacre (ܦܪܡܬܐ ܕܣܡܠܐ, Pramta d-Simmele) was the first of many massacres committed by the Iraqi government during the systematic targeting of the Assyrians of northern Iraq in August 1933. The killing spree that continued among 63 Assyrian villages in the Dohuk and Nineveh districts led to the deaths of an estimated 3,000 Assyrians. August 7 became known as Martyrs Day (ܝܘܡܐ ܕܣܗܕ̈ܐ, Yawma d-Sahdhe) or National Day of Mourning by the Assyrian community in memory of the Simele massacre as it was declared by the Assyrian Universal Alliance in 1970. In 2004, the Syrian government banned the Assyrian political organization and the Assyrian community of Syria from commemorating the event, and threatened arrests if any were to break the ban. Assyrian New Year The Assyrian new year festival, known as Resha d-Nisan (literally 'Head of April'), is celebrated on the first day of spring and continues for 12 days.