Dreams are sometimes real dreams and other times push dreams which are not real dreams. Real dreams can happens during sleep in proper time and never come during a wrong time of sleeping e,g. Between dawn and sunrise or between Assr and Maghrib.
'Real dreams can be interpreted in many Islam according to Quranic verses and authentic Hadeeths.
'Quran mentioned about real dreams seen by Prophet Muhammad (SAWA) (Sura Al-Anfal, verse 43) and Prophet Ibrahim (Sura Al-Saffar, verse 102, and Prophet Yusuf (Sura Yusuf, verse 100) .
Wassalam.