when he was 40 years old
Prophet Muhammed had received a message from ALLAH, and from that day on it spread.
Islam
From the time of prophet Muhammed (S.A.W), obviously I cannot be 100% sure this is fact as I was not there at the time, but from what i understand, the Jews were completely against Islam in that they believed that the last prophet would arise from amongst their people and refused to accept that he was Muslim.
in mecca city at age 40 when he heard his first revelation and first talked to his wife Khadija.
there is no birth place of Islam, prophet Muhammed (pbuh) completed the religion _______________________________________________________ Islam means submission to the Creator. Its birth place is the universe as it started by start of universe creation by God (same God in Christianity, Judaism, and Islam). However, Islam per Quran God revelation to prophet Muhammad (peace be upon him) started in Makkah (or Mecca) in the current country called Kingdom of Saudi Arabia. Refer to question below.
Prophet Solomon (or Suleiman) and prophet Saleh
Islam started in Arabia 1432 years ago _______________________________________________________ It was the immigration of prophet Muhammad (PBUH) from 1432 years ago and not the religion start. The religion that had begun in the currently called Saudi Arabia is the full submission to God and surrender to His will (called in Arabic Islam). This is the religion since start of mankind in the area from the prophet Adam, Noah, ..., Abraham, ..., Moses,..., Jesus, and Muhammad (peace be upon them).
If you mean Islam per Quran revelation to prophet Muhammad (PBUH), then Islam started by start of first revelation of Quran by God (Allah in Arabic) to prophet Muhammad (PBUH) through the angel Gabriel (Jibril) in year 610 AD. If you mean Islam in its sense of submission to Allah (God in English), the Creator, then Islam started by start of universe creation. refer to related question below.
Islam was started long before prophet Muhammad (PBUH). It was started by God; the Creator; by start of universe creation. However, Islam per God revelation of Quran to prophet Muhammad (PBUH) started by start of Quran revelation through the angel Gabriel to prophet Muhammad (PBUH) on year 632 AD. Refer to questions below.
the very first man " Adam " was muslim all the prophets were muslims like Noah, Abraham, Jecob, Mossess and Jesus . they all were muslims. Muhammed is the last prophet of Islam , not the first. Islam is the religion of God and God is the very first Being , who created every thing.
Muhammad started teaching Islam religion in the year of 610 A.D
prophet Muhammad (P.B.U.H) Allah made Islam