There are three main times when Salah (Islamic prayer) is considered forbidden (makruh tahriman):

From the time the sun begins to rise until it has fully risen: This period is known as Fajr al-Kazib (false dawn), and any Salah time performed during this time is considered invalid.When the sun is directly overhead at its highest point (zuhr): This period is known as Istiwa al-Qaylmah (culmination of the sun), and although not completely forbidden, performing Salah during this time is highly discouraged. It's recommended to wait a few minutes for the sun to shift slightly before offering Zuhr.From the moment the sun starts to set until it has completely disappeared below the horizon: This period is known as Ghurub al-Shams (sunset), and any Salah performed during this time is considered invalid.

Additionally, some scholars consider the following times as discouraged for Salah:

After Zuhr until Asr: While not outright forbidden, performing Salah during this time may be less rewarding.After Asr until Maghrib: Though not forbidden, some scholars recommend focusing on recitation and remembrance of Allah during this time instead of Salah.

It's important to remember that these are general guidelines, and specific recommendations may vary depending on your interpretation of Islamic jurisprudence and local tradition. If you have any doubts about the appropriate times for Salah, it's always best to consult with a qualified Islamic scholar for guidance.

I hope this information clarifies the forbidden and discouraged times for Salah!