Onthekeys,
For the first 3 to 4 months ( your training ) you will mostly fly only day flights with sometimes flights landing back to Dubai around 23h00 local.
Your destinations will mostly be in Saudi Arabia ( JED , MED , RUH , TIF , AHB , ELQ , DMM ) with some DOH , MCT , BAH , KWI , BEY...
But once you will be released on line this will be a complete different story , you can expect a lot of night flights and to the less desired destination ( war zone for example ) Afghanistan and Iraq.