Most of the answers to your questions can be found on the Steinhardt and NYU Commencement websites. Keep in mind that Commencement and Graduation are totally different meanings - Commencement is the ceremony where you are celebrated but Graduation is the actual conferal of your degree and completion of your program.
Here are some Commencement Highlights:
Commencement ceremonies are only held in May. If you are a September or January graduate, you are invited to participate in the May ceremonies. But attendance to both ceremonies (Steinhardt Ceremonies and NYU Commencement) are optional.
If you're planning to walk at the ceremonies (whether you are a September, January, or May graduate), you have to apply for graduation.
To apply for graduation, you can do so in your Albert account.
If you haven't applied for graduation (within the application deadline), you must contact the graduation services (graduation@nyu.edu) as soon as possible.
The All-University Commencement is held at Yankee Stadium, around mid-May, rain or shine.
As it gets closer to the date, keep an eye on the weather and come prepared for inclement weather.
Use this link for information on ticket distribution for the All-University Commencement, including the Extra Ticket Policy. Updated information becomes available closer to the May graduation ceremonies.
You also need to order academic attire in order to participate.
Important Note: Because of the limited space at Yankee Stadium, students are only allowed 4 tickets in total (1 for the student, 3 for guests). There is NO guarantee that you will be able to receive additional guest tickets from the university. If you anticipate needing more guest tickets, pay attention to the information provided for requesting additional tickets AND start coordinating with your peers to see if anyone has extra tickets they will not be using.
Don't forget to invite your parents!
Steinhardt Bachelor of Arts candidates attend the Baccalaureate Ceremony.
Use this link for information on ticket distribution, dates, and information on requesting additional tickets. Updated information becomes available closer to the May graduation ceremonies.
Important Note: Because Commencement celebrations are organized centrally by the university and school, ASH does not know how many tickets you will receive, whether extras will become available, and/or how many extras you are able to request. What we can tell you is that, in the past couple years, students have typically received 4 tickets (1 for you and 3 for guests). If you anticipate needing more tickets than you will be offered, pay attention to the information provided for requesting additional tickets AND start coordinating with your peers to see if anyone has extra tickets they will not be using.
All-University Commencement is typically held on a Tuesday or Wednesday in mid-May.
Visit this page for information on renting appropriate academic attire.
Requesting tickets for the NYU Commencement is handled separately from requesting tickets for the Steinhardt Ceremony. Information can be found on the link above.
Do your guests need a visa to visit you and attend the ceremony? View the information on this page for details.
Here is a useful E-how article that may help you figure out what to wear under your cap and gown. You should wear cocktail dresses, slacks/skirt, and a blouse/nice shirt. Avoid wearing jeans and t-shirts.
Keep in mind the gown is a dark purple so you don't need to worry about certain colors showing through.
No one will see what you are wearing under your cap and gown during the ceremony. What you wear underneath will be most relevant before and after the ceremony. When in doubt, ask your parents/guardians what they want to see you wearing for the slew of family pictures.