Museum Pass in Paris Help!

I am not sure what the confusion is. The pass is valid consecutive days. If two of those days are Monday and Tuesday then you have to organize your days to use it with things that are open each of those days. Pick one up at the first museum you visit; choose one without the worst lines e.g. the Cluny is always good for this; the Louvre is not bad for this if you enter at the Carrousel; the Orsay would be a poor choice.

The clock starts ticking on the first day you use which is known by the date you write on it. I write out the month and day (January, 06 2017) ,to not be confused with the European way of writing dates( 1/6/2017 would mean June 01,2017 in Paris). You just need to plan your days wisely, so the days A is closed you go to B etc.

You will find all or most of your answers on the interactive official website for The Paris Museum Pass.

You may want to make a list of the museums & monuments you'd like to visit, note when they are closed, and
plan your visits accordingly.

As previously mentioned, you'll need to write your name, plus the date when you first use it, however you need to write the date in the proper order being; Date/Month/Year

Enjoy Paris!

Edit to add...
Keep in mind that some of the museums stay open on some evenings. You can search this information on the link given above.

Obviously it's not ideal if you are planning to buy a 2 day pass for use on Mon+Tue. Fortunately, it's a case of most museums being closed on one day or the other, so it's necessary for some organisation.

Museums closed on Monday ...
Musée d'Orsay
Musée Carnavalet
Musée du quai Branly
Musée Rodin
Musée Marmottan
Musée Picasso
Musée Nissim de Camondo
Versailles

Museums closed on Tuesday ...
Musée Eugène Delacroix
Musée du Moyen-Age (Cluny)
Musée de l’Orangerie
Centre Pompidou
Musée du Louvre
Musée Nissim de Camondo
Fontainebleau

This is a perfect example of the type of planning to do before your trip. Plan out the use of your card. You don't have to go in exact order, but a general detail of what is open, their locations and hours is something you can prepare ahead of time and move more efficiently when you are on the ground in Paris.

For me, one weekend in Paris, then another five days at the end of my trip. The first weekend was Journee du Patrimoine (heritage days) so I planned to see things that were not normally open to the public (everything free so no pass needed). When I came back, I decided on a four day pass to cover most of the museums and the last day to pick up odds and ends (mostly free admission) that I hadn't yet visited.

You should definitely have sorted out what is closed on Monday or Tuesday as well as anything that is open late (as the last sight for the day).

I know many feel that a Paris Museum Pass is a must purchase for every visitor, but I don't agree. Of my three most recent trips: on one I barely made the pass break even, on another I got almost double the value, and on a third I was focusing on non-covered places and so didn't get the pass at all.

So, as Brad says, plot out what you're definitely seeing and on which days, and make sure it makes sense for you.

Remember that it is also good for the Arc de Triomphe (I went up twice, part of how I made that pass such a good deal), which is open every day. Also remember that, per day, the longer passes are much cheaper than the shorter ones. Finally, Versailles is so expensive that it helps pay for a pass day almost by itself.

If you decide to get the pass, I recommend buying at a less crowded museum/spot. One great thing about the pass is that you don't have to wait in the ticker lines for each museum. What day of the week are you arriving in Paris? We arrived on a Monday and found plenty of places to go. Also, if you fly into CDG, Monday is the best day to buy a Navigo transit pass, and it will take you into the city from the airport.

There are lots of places you can buy the pass, including TI's around the city, a departement store or two, and the airport. You should activate it, by writing in your name and the date, but only when you begin to use it.

Musee Carnavalet has been closed for renovations since October 2016 and will remain closed until the work is completed, sometime in 2019. Cross this one off your list.

Many people think that you can skip the general admission line by using a Museum Pass.
There are special entrances for Museum Pass holders - you have to look for the signs.
But everybody must go through the Security line, each time you enter.

Best not to bring large backpacks or tote bags on days when you want to visit museums.

there are separate security lines for pass holders and ticket holders at the museums where lines are the biggest problem. You can bypass the security line at the Carrousel du Louvre (basically walk to the head of the security line via the bypass) and the Orsay has a separate door for pass/ticket holders which often just involves walking in and rarely is more than a 15 minute wait. The Pompidou and Orangerie also have separate security for pass holders. So yes, you do save line time with a pass.

For a first time visitor who has only a few days, the convenience, the ability to visit a place more than once, the ability to sample something briefly that you might not be willing to buy a full admission to and the line advantage make the pass often worth it even if you dn't save much money. And if it costs you a few Euros more that is pretty trivial in the course of an expensive international trip.