YC X25, the spring 2025 batch

5 months ago (ycombinator.com)

good for them but

> One of the first questions people ask when we say we are doing a spring batch is what letter we will use to refer to it since “S” is already taken for the summer batch. We considered something like “Sp” or “P” but one founder made the suggestion of using “X” since it's a common variable name in programming and thus makes sense since the name “Y Combinator” itself is a programming term.

This chain of reasoning seems totally disconnected? "While trying to come up with a single letter to denote spring, since S was taken, we decided on... a common variable name instead" ??? what happened to denoting spring in there? Am I missing some clever reference? Is spring in particular the season for common variables?

The spring constant (in physics) is denoted by the letter "k", why not use that? I know its not programming, but at least it denotes spring.

  • Notation is ultimately arbitrary, it's just what everyone has agreed on.

    (As a fun fact, Spanish has decided to use X for Wednesday because both Wednesday and Tuesday start with the same letter, M: https://www.20minutos.es/cultura/blogs/yaestaellistoquetodol...)

    • I learned a while back that Miercoles is a minced oath in Spanish. As in, you start to say the other thing that starts with Mier--, make eye contact with a child, and say the other thing.

      2 replies →

    • I think you may need to review what that word means in case you have an incorrect belief about its definition. Almost all notation ever created has a reason or a system, I have no idea why one would think its ultimately arbitrary (having no reason or system).

      Consensus is not arbitrary either, that's a strong reason, a lack of arbitrary-ness. Even the second definition of arbitrary, something done unilaterally, is contra-consensus.

      1 reply →

  • Also the word for “of or pertaining to spring” is “vernal”, so… V? Obscure and a bit antiquated, but also technically correct (the best kind).

  • G would have made more sense

    In MTG the 5 colors are white, blue, black, red, and green. WUBRG. B is already taken by black (bla > blu) so blue became U. Hence in my head logic spring should have been G (technically sp > su but no point to change summer’s S after decades)

  • In good spirit of programming, nothing better than a terrible non-descriptive one character variable name.

  • I think SP would have been the best. The thing about W25 or S25 is that you can guess what W or S means without being told. Can you imagine trying to explain this to someone? There's nothing about it that makes sense. There's no kernel of intuition to chew on. You'd finish explaining and the other person still wouldn't get it.

    "What batch were you?"

    "X25"

    "What does X stand for?"

    "Oh yeah haha, its a clever programming reference, it actually means spring, but S was taken by summer, so they used X instead because its a common variable name."

    • Most likely by the time you are asked “what batch were you?” Anyone that would be asking that question is going to be familiar with the naming convention whatever it is

  • I would just take the opportunity to rename all batched 1,2,3,4 and call the batches yc25 etc to denote all batches in 2025 etc. who cares what season you are in at this point. But this is just me.

  • Z would have made more sense as a pair of the Y combinator (and the next letter).

    X is jut plain boring because there's nothing theoritical behind it.

We’re hosting a meetup in SF for founders applying to the first-ever spring batch

Come connect with other ambitious founders and gain insights from the YC alumni

Date: Feb 6

Time: 6:30 PM

RSVP here: https://lu.ma/lwdw64cn

See you there!

What about YC25q1, YC25q2, YC25q3 and YC25q4?

  • Hey quit it with that universally understood, sensible solution. We're here to disrupt!

    • Well, (based on zero information) YC probably is on the same fiscal year as California, so spring would be 24q4 ;p

  • Seems sensible. The northen-hemisphere naming means I (and many others) need to pause and translate S and W every time.

They should do batches by pure three digit numbers. E.g.

251 for winter 252 for spring 253 for summer 254 for fall

Our startup(from India) applied twice last two batches, and were rejected but now we're far beyond MVP stage, we've had LOI and traction from users, it seems that we do not require additional funding should we still apply for X25 ?

  • I would if I were you. Most startups that get funded by YC have applied more than once, so this is normal.

    The main thing is to be able to demonstrate progress since the previous application, which it sounds like you can. Good luck!

Honestly, X is such a cool prefix I would opt for this batch. It sounds like you are part of some skunkworks batch.

The "F" batches are a bit confusing due to the YC Fellowships eons ago whichd I recall were prefixed with "F" as well.