There is no possible canonical answer.
For 2012 new gTLD round, each applicant was coming with some kind of business plan, for what it wants to do with the TLD. Some are restricted to a brand, some to a geography, some are bound by other restrictions, and some are completely open.
If you go to https://gtldresult.icann.org/applicationstatus/viewstatus and then search by TLD (warning: they could be multiple applications per TLD and of course at most one is the winner), you can then view the initial registry plan. Of course it can have changed this then.
.day is a Google TLD, like
.new (that one goes live during this summer of 2020).
Google Registry is one registry not sharing a lot of their plan in advance. I, for one, have no public data on this TLD launch.
If you read their initial submission at https://gtldresult.icann.org/applicationstatus/applicationdetails/1334 you can read:
18.a. Mission⁄Purpose of the Proposed gTLD
The proposed gTLD will provide the marketplace with direct association
to the term, ʺday.ʺ The mission of this gTLD, .day, is to provide a
dedicated domain space in which registrants can enact second-level
domains that relate to memorable, special, or hallmark days and⁄or
physical or online events. This mission will enhance consumer choice
by providing new availability in the second-level domain space,
creating new layers of organization on the Internet, and signaling the
kind of content available in the domain. Charleston Road Registry
believes that registrants will find value in associating with this
gTLD, which could have a vast array of uses. Charleston Road Registry
expects these uses may include but are not limited to applications
such as birth.day, christmas.day, wedding.day, rememberthat.day, and
By this reading one might get to the conclusion that it will be open to any registrant. One day :-)
The only obligation they have is to give ICANN details of their launch in advance.
This would happen here: https://newgtlds.icann.org/en/program-status/sunrise-claims-periods
There is nothing about
.day there yet.
Note also that any knowledgeable registrar should be able to keep you in the loop as soon as it gets news for that TLD.
can I already reserve my desired domain name?
Irrespective to all the above, you can't do that, in any 2012 gTLD.
Registries do not take "advance" reservations. Some registrar may make you believe so, and make you pay for it, but:
- registration requirements can be known only very close to opening, and can depend on the name chosen, so your choice might not even be possible
- since registries do not provide this service, registrars will keep your name and then try to register it at adequate time, however they will compete with all others so no guarantees for you whatsoever
- gTLDs open in rounds, with a mandatory sunrise, and possible EAP and LRP phases; the restrictions are different in each, as are the prices (which are also often not known precisely until very close to opening).
ICANN itself warns you about this case:
As responsible Registrars are advising, successful pre-registration of
a domain cannot be guaranteed. ICANN seconds that advice, cautioning
that registrants should be wary of anyone who claims to be able to
guarantee a domain registration on a new gTLD. There are several
situations that can impact the availability of a domain name and some
domain names may never be available for purchase.