In a synagogue, Actually a Jewish wedding does not have to take place in a synagogue, the wedding can be in a fancy hall or a simple garden... -as long as the proper Hebrew documents are present...
Muslims listen to a sermon then pray Jumaa prayer. Jumaa means "gathering" or "mass" (Friday in Arabic is named after this prayer). What really takes place in Friday in Islam is namaz-e-Jumma Jumma...
They can take place on any day except Saturday, during the day or at night.
There are some days during the year when, for historic or Halachic reasons, weddings are not scheduled:
Jewish festivals...