The migration of Muhammad to Yathrib is called what in Arabic? It is known as the year of the Hijra?

Answer 1

Hijra means migration.

Prior to the migration, Medina was known as Yathrib.

Medina means "the city."

Answer 2

Muhammad(pbuh) was born in Mecca in the year 570. Since his father
died before his birth, and his mother shortly afterwards, he was
raised by his uncle from the respected tribe of Quraysh. As he grew
up, he became known for his truthfulness, generosity and sincerity, so
that he was sought after for his ability to arbitrate in disputes.
The historians describe him as calm and meditative. Muhammad (pbuh)
was of a deeply religious nature, and had long detested the decadence
of his society.

It became his habit to meditate from time to time in the Cave of Hira
near Mecca. At the age of 40, while engaged in a meditative retreat,
Muhammad(pbuh) received his first revelation from God through the
Angel Gabriel. This revelation, which continued for 23 years is
known as the Quran. As soon as he began to recite the words he heard
from Gabriel, and to preach the truth which God had revealed to him,
he and his small group of followers suffered bitter persecution,
which grew so fierce that in the year 622 God gave them the command to
emigrate.

This event, the Hijra 'migration', in which they left Mecca for the
city of Medina, marks the beginning of the Muslim calendar. After
several years, the Prophet and his followers were able to return to
Mecca, where they forgave their enemies and established Islam
definitively. Before the Prophet saw dies at the age of 63, the
greater part of Arabia was Muslim, and within a century of his death
Islam had spread to Spain in the West and as far East as China. He
died with less than 5 possessions to his name.

While Muhammad (pbuh) was chosen to deliver the message, he is not
considered the "founder" of Islam, since Muslims consider Islam to be
the same divine guidance sent to all peoples before. Muslims believe
all the prophets from Adam, Noah, Moses, Jesus etc. were all sent
with divine guidance for their peoples. Every prophet was sent to his
own people, but Muhammad(pbuh) was sent to all of mankind. Muhammad
is the last and final messenger sent to deliver the message of Islam.
Muslims revere and honor him (pbuh) for all he went through and his
dedication, but they do not worship him. "O Prophet, verily We have
sent you as a witness and a bearer of glad tidings and a warner and
as one who invites unto God by His leave and as an illuminating
lamp."(33:45-6)

Answer 3

I think it's called 'Hijra'.

http://lexicorient.com/e.o/hijra.htm