So I'm trying to figure out which Missal is best for a Latin Mass and it turns out I have an old one from 1955 which is in quite good condition still.

However, in going through the week's readings, I noted that May 11 (my birthday coincidentally) has a slightly different calendar than the one listed here for 1962: http://www.tridentinecatholic.com/cal2017.pdf

In the 1962 missal, May 11 is Saints Philip and James Apostles. In my 1955, it's St. Lucia Filippini, Virgin.

In the 1955 on May 31 it's St. Angela of Merici, Virgin. In the 1962 it's The Blessed Virgin Mary Queen of Heaven and Earth Commemoration of St. Petronilla Virgin.

So I'm going to guess this 1955 is worthless.

So should I purchase a 1962 or a 1958? This is getting confusing.

So I'm trying to figure out which Missal is best for a Latin Mass and it turns out I have an old one from 1955 which is in quite good condition still.

However, in going through the week's readings, I noted that May 11 (my birthday coincidentally) has a slightly different calendar than the one listed here for 1962: http://www.tridentinecatholic.com/cal2017.pdf

In the 1962 missal, May 11 is Saints Philip and James Apostles. In my 1955, it's St. Lucia Filippini, Virgin.

In the 1955 on May 31 it's St. Angela of Merici, Virgin. In the 1962 it's The Blessed Virgin Mary Queen of Heaven and Earth Commemoration of St. Petronilla Virgin.

So I'm going to guess this 1955 is worthless.

So should I purchase a 1962 or a 1958? This is getting confusing.

Keep your 1955 Missal. It is still good. Saints' feasts vary and are not set in cement, for instance if you go to Mass at a Carmelite chapel you might find that they are celebrating a Carmelite saint, ditto for the Benedictines, the Dominicans etc. Saints can also vary from country to country. Besides there are far too many saints for one/day!
My New Sunday Missal celebrates Saints Philip and James Apostles on May 11, while my New Roman Missal 1945 reprint has no saint for that day (?) so hang on till you know more about it.

Before deciding find out which one the chapel you are going to uses. If you can get that exact one it will help a lot to keep you on the same page as everyone else. . .
 

The missals that use "you" instead of "thy", are the modernized.  I don't care for them.

There are missals that use "you" instead of "thy"?  I've never seen one of these.  That's interesting.

Believe it or not, it used to be against the code of canon law for Catholic laity to own vernacular translations of the missal.  Traditionally this was frowned upon.  During the pontificate of Leo XIII, this tenant was widely ignored.  Then, along came Pius X, and suddenly what was frowned upon was positively encouraged.  (Perhaps Pius X was sponsored by Desclee and Co, which, surprise! is a Belgium company.  You know, Amsterdam, ancient seat of European Jєωry...but I digress.)  The missal is a distraction.  The pewgoers are more worried about following the Mass than praying the Mass.  The Missal gave rise to the "dialog mass". precursor to the Novus Ordo.  (I can smell something burning- the tempers of a lot of "fifties fogies" who think that all the evils of liturgical anarchy date from Vat 2 and Good Pope John... but I digress.)  

The Most Holy Rosary is your Mass, your Office, your Rule, and your Enclosure...

Your Mass, because the Rosary will take you to the Foot of the Cross, which is the Mass.
Your Office, because the 150 Hail Marys contain the wisdom of the 150 psalms.  The Rosary is Our Lady's Psalter.
Your Rule, because, as all monks have a rule (the most famous being the Holy Rule of St Benedict, lots of wisdom there even for laymen, for all Christians are called to be "Monastic") and through the Rosary Our Lady will give you "signal graces", signals that will help keep your boat afloat in your particular place and circuмstances.
Your enclosure, because the Rosary will you give you peace no matter where you reside on the stormy sea of this life.

Once upon a time, I was a Missal Catholic.  Been there, done that.  After a few months, I found the Missal to be a distraction.  Missal Catholics are more worried about whether they are ahead or behind the priest than whether they are really prayerful.  If you find yourself being buffeted by distractions, it is probably because you are too immersed in the world.

Our Lady of Fatima, pray for us, you are our only hope.

Believe it or not, it used to be against the code of canon law for Catholic laity to own vernacular translations of the missal.  Traditionally this was frowned upon.  During the pontificate of Leo XIII, this tenant was widely ignored.  Then, along came Pius X, and suddenly what was frowned upon was positively encouraged.  (Perhaps Pius X was sponsored by Desclee and Co, which, surprise! is a Belgium company.  You know, Amsterdam, ancient seat of European Jєωry...but I digress.)  

Your post is one long digression. Exleftist asked about what Missal he should acquire, not whether or not he should use a missal in Mass.
Can you give a reference for your claim that the code of canon law used to be against Catholic laity owning a vernacular translations of the missal?

By the way, the word is "tenet" not "tenant", and Amsterdam is not in Belgium. 

Greetings.
I know this off topic for the post.  I never said Amsterdam was in Belgium.  But, last time I consulted a map, the two were in very close proximity.
Okay, in future posts I will try and be more angelic with technical details.
I don't want to get into a shooting war here.

"If you asked Traditional Catholics to form a firing squad, they would make a circle"- Michael Matt

Our Lady of Fatima, pray for us, you are our only hope.

Can you give a reference for your claim that the code of canon law used to be against Catholic laity owning a vernacular translations of the missal?

I expressed myself poorly. I should say: Can you give a reference from Canon Law, for your claim that the code of canon law is against Catholic laity owning a vernacular translations of the missal?

Thank you.