Races are held between April and December at the Veliefendi Hippodrome near Bakerky, 15 km (9 miles) west of Istanbul.
The races are only held in February in Istanbul. 
mnli hypothesis: The races are only held in February in Istanbul.  premise: Races are held between April and December at the Veliefendi Hippodrome near Bakerky, 15 km (9 miles) west of Istanbul.