Jumah Salah before Zawaal
According to the majority of Ulama’ the meaning of the hadeeth is that Rasulullah salallahu ῾alayhi wasallam would pray jummah right after the Zawaal of the sun (zenith). Hence, the time for Jummah Salah according to the majority is same as that of Dhuhr.
However Imam Ahmad ibn Hanbal rahimahullah and some Ulama’ of Dhahiriyyah view Jummah Salah to be permissible even before the Zawaal. According to them the starting time of Jummah Salah is Dahwatul Kubra’