Fast of Nineveh
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In Syriac Christianity, the Fast of Nineveh is a three-day fast starting the third Monday before Clean Monday from Sunday Midnight to Wednesday noon, during which participants usually abstain from all dairy foods and meat products. Wikipedia
2023 date: 6–8 February (Coptic orthodox) 30 January- 1 February in churches using the Western Calendar
Ends: Thursday of the third week before Lent (i.e. feast day)
Related to: Great Lent