Can you describe a Catholic Mass in full details?

The Mass consists of:

The Intro, a combination of opening greeting prayers.
The Confiteor, an admission of sins and request for absolution.
The Gloria, a prayer celebrating the Glory of God.

The readings:
A reading from the Old Testament
A Reading from the Epistles or Acts
The Gospel, a reading from one of the four Gospels.

The Homily, or Sermon, where the Celebrant or another person speaks to the Congregation either on one of the readings, or on a subject which is a topic for the Mass.

The Creed, a prayer said after the homily professing the beliefs of the Church.
Prayers of the Faithful, where specific petitioning prayers for the week or the Mass are said.
The Offertory, where the collection is taken up and the bread and wine are presented to the Priest.

Preparation of the gifts, prayers of thanks over the bread and wine.
The Consecration, prayers over the bread and wine in memory of the Last Supper, in which the bread and wine become the Body and Blood of Christ.

Prayers in preparation for Communion, including the Doxology and the Lord’s Prayer
Communion, in which the Congregation shares in the Consecrated bread and wine.

Closing prayers and Blessing.

Takes a little less than an hour.

A Catholic Mass usually is pretty predictable as there is an order of service called a Liturgy that doesn’t change a lot from week to week.
Here is an example I found online

Catholic Mass is approximately the same as Muslim Mass?

In all fairness.

@zenvelo… what happens, or do they think will happen, if they miss one or more of those steps?

And there is lots of standing up, sitting down, kneeling. A good workout! I was always glad when the sermon was over because it meant that mass was almost over.

@Dutchess_III It is a ceremony, a rite. And much of it is not required. But it would be incomplete.

Nothing “happens”. It just isn’t a Mass without the important parts. Sort of like “What happens if you don’t exchange rings in a wedding ceremony?” It’s still a marriage. But it isn’t a marriage without the important parts, like exchange vows and sign the license.

As a former altar boy, I should point out you’re all missing the uncontrollable yawning between each part.

I went to a Pentecostal church. I attended a AME church once, and I loved it. Their aim is to excite and inspire. That didn’t bring us closer to God, obviously, but at least it wasn’t boring.

I got just the opposite from any Catholic mass I attended. I just wanted to go to sleep!

Congratulations to @zenvolo on tackling a project I thought would require a lengthy essay. When I was in grade school, school began daily with a mandatory Mass (30 minutes). The Mass underwent a major makeover since then under Pope John XXIII in an effort to make the process more accessible to the congregants and give them more participation. These and other measures were deemed necessary to counter the increasing hemorrhage of membership from the Church in the face of growing secularization and competition from more charismatic versions of Christianity and other cults. No description of the Mass does it justice. If you REALLY want some sort of handle on the process, you should simply sit in on a few. Another result of the big makeover is that the former practice of “saying the Mass” in Latin was abolished, and the procedure now takes place in the language and dialect of the participants.

Sometimes they will pass around the collection plate again for a special, specific purpose.

If you are there with your wife, do not refer to this as “The Second Coming”; they get upset.

Here’s some clarification of @zenvelo‘s excellent post for things I think some may confuse you if you aren’t familiar with Catholic stuff. I hope I don’t make it worse.

-In most cases, the priest is the one who says the Homily. It’s also almost always about the Gospel reading.
-Many people in Mass can recite the Nicene Creed, but many people just mumble through the confiteor.
-Readings from the Epistles and Acts are anything in the New Testament other than the four Gospels.
-In the offertory, @zenvelo said that bread and wine are presented to the priest. So, the bread and wine are what Catholics believe the priest turns into Jesus’s body and blood, a big part (if not the biggest part) of Mass. These two things are at the back of the Church until selected people bring them up during the offertory procession.
-After the Lord’s Prayer, the priest encourages everyone to share a sign of peace with each other.
-Most Masses do last about an hour, but it does vary greatly. There’s one parish I used to go to whose Sunday Masses were about 35 minutes long. The Vatican ones are hours long. I’ve been to a Mass that was 18 minutes long.

Thanks everyone who offers me information. I have another question: I found this, which claims to be a detailed account of a Mass. According to the link the priests remain inside the chapel throughout the Mass (except for the wearing clothes part). However when I watch videos about Mass (for example this), I see that the priests go to the chapel from the front door at the beginning of the Mass. Can you explain this contradictory?

@Mimishu1995 That is a description of pre-Vatican ii mass, the old Latin Rite, which the Church reformed in the 1960s. As @stanleybmanly said, the old Mass was different, said in Latin, and there were other changes. The Altar is now situated so that the priest faces the congregation; before as in that link, the Priest had his back to those attending.

Priests differ from how they start the Mass. Most Sundays, the Priest enters from the back of the Church, and proceeds to the Altar. But in some Masses, such as during Lent or Advent, when the mood is more contemplative, the Priest may enter from the Sacristy or even just sit meditating to the side of the Altar before the welcoming prayer.

Time involved per mass is about 55 minutes for a small church. More time needs to be allowed for Easter, Christmas services, if many are receiving communion, how long winded the priest is concerning his sermon.

@Mimishu1995 There is no significance placed on the arrival of the priest at the altar,. No one cares from which portal or direction he approaches the altar.

@Mimishu1995 Your first link describes the prayers that the priest says that no one always hears. For instance, I used to be an altar server, and when the offertory procession is going on (offertory=donation baskets are being passed around and the bread and wine are being brought up), the priest is saying all kinds of things to what seems to be himself. When we as altar servers went to bring the water to wash the priest’s hands, he’d quietly mumble something like “Lord, wash away my sins and cleanse me from my iniquity” to himself. The reason nobody says anything or wonders why the priest is mumbling to himself is because there’s music in the background. Usually, these mumbly prayers occur when music is playing.

Oh, and the way in which the congregation goes up to receive communion varies between Churches, too. At the Church I used to go to, the people in the front pews went up first, and it continued back as the people in the last pew were last to receive communion. At other Churches, the people in the back pews are first in the line and it continues to the people in the front rows. At bigger Churches, there are Eucharistic Ministers (people who give out Communion, requires certification) at the front and ½ way down to speed up the process.
[edit]: from the first post, some of those lines in your first link are things that he says aloud, such as the Our Father. I’m guessing it’s an older version, as another Jelly had pointed out (I’m not old enough to know, and I only know some of the things the priest says to himself).