Kha b-Nisan, Ha b-Nisin,[1] or Ha b-Nison (Syriac: ܚܕ ܒܢܝܣܢ, "First of April"), also known as Resha d-Sheta (Syriac: ܪܫܐ ܕܫܢܬܐ, "Head of the year") and as Akitu (ܐܟܝܬܘ), or Assyrian New Year,[2][unreliable source?]

is the spring festival among the indigenous Assyrians of northern Iraq, northeastern Syria, southeastern Turkey and northwestern Iran,[3] celebrated on the first day of April.

Celebrations take place throughout Assyria and other areas in the Middle East, along with some in the United States, Europe, Australia, Canada and the Caucasus among Assyrian diaspora communities.

Around 5,000 people "including large groups of visiting ethnic Assyrians from Europe, Syria and Iraq" took part in the Kha b-Nisan celebrations.

Public celebrations were not allowed by Saddam Hussein's regime prior to the start of the Iraq war.

[20] Assyrians celebrate Kha b-Nisan by holding social events including parades and parties.

[5][10] People greet each other by saying Reesh Shato Brikhto, Reesha D’Sheeta Brikhta or Akitu Breekha.

[10] Due to its modern alignment with April Fool's Day, the festival is often more lighthearted than its historical counterpart.

[10] It is a tradition in Assyrian villages for girls to gather flowers and herbs which are then suspended under the house's roof or made into a garland for a home's front door.