All of the 'holidays' mentioned above are not biblical but started by men. In particular, the largest Church - the Roman Catholic Church - incorporated each of the above into their religious calendar. After the Reformation and Anglican splits, most all 'daughter' churches continued in these celebrations. But not all Christians observe some/none of these but continue to keep the Holy Days of God first given to the Israelites and kept in the Church Jesus and the Apostles began.
A lot of it depends on what domination you are in. The basic ones that all Christians celebrate are Christmas and Easter. Others include Advent, Pentecost, and Lent.
Christians celebrate , Easter and Christmas among others
by singing, dancing and feasting
We celebrate Christmas of course, Easter and holy week, for the most part these are the ones agreed on.
Not all Christians celebrate Easter so No
Christians have three main festivals, they are Christmas, Easter and Good Friday.
the holiday important as christmas is lent a piriot of 40-day
Most Moroccans (99%) are Muslim. As a result, they do not celebrate Easter. Any Christians in Morocco are free to celebrate Easter and there is a famous church in central Tetouan where Easter is celebrated.
Christians celebrate three essential events: Good Friday, Easter and Christmas. In addition, there are several other events during the year which are important, depending on the Christian denomination. Some denominations celebrate events such as Epiphany, Harvest Thanksgiving, Pentecost, Advent, the Reformation (Lutherans) and remember (not "celebrate") events such as Ash Wednesday and Lent.
There are some Christians in Israel who do celebrate Easter, but the Jews and Moslems in Israel do not celebrate it.
No, depending on what religion they are, they celebrate other holidays too. (ex. African American Christians also celebrate Christmas, Easter, etc.)
Both Easter and Christmas celebrate Jesus Christ's life. Christmas is a celebration of His birth and Easter is a celebration of His resurrection.