1) At the outset, it is important to understand that it is a major sin to miss the Jummah Salaah without a valid reason. However, in the event of one missing the Jummah, he will make Qadha of Zuhr Salaah. [/quote]
Source: askimam.org/public/question_detail/15070
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[quote]Walaikum assalam,
I pray that you are well.
It is obligatory to perform Zuhr prayer within the time if Friday prayer is missed with excuse or without (in which case it is sinful and also requires sincere repentance). If one fails to make it up within the time, then one must make it up (as a Zuhr prayer).
[Shurunbulali, Maraqi al-Falah; Ibn Abidin, Radd al-Muhtar]
And Allah alone gives success.