Day Date Month Holiday Friday 01 Jan New Year's Day Saturday 23 Apr National Sovereignty and Children's Day Sunday 01 May Labour and Solidarity Day Thursday 19 May Commemoration of Atat?rk, Youth and Sports Day Monday 04 Jul Ramadan Feast (Half Day) Tuesday 05 Jul Ramadan Feast Wednesday 06 Jul Ramadan Feast Thursday 07 Jul Ramadan Feast Tuesday 30 Aug Victory Day Sunday 11 Sep Eid Al-Adha (Feast of the Sacrifice) (Half Day) Monday 12 Sep Eid Al-Adha (Feast of the Sacrifice) Tuesday 13 Sep Eid Al-Adha (Feast of the Sacrifice) Wednesday 14 Sep Eid Al-Adha (Feast of the Sacrifice) Thursday 15 Sep Eid Al-Adha (Feast of the Sacrifice) Friday 28 Oct Republic Day (Half Day) Saturday 29 Oct Republic Day Source: http://www.borsaistanbul.com/en/products-and-markets/official-holidays