Today marks the alpha freeze along with the software string freeze and Bodhi activation point deadlines. The actual Fedora 24 release is slated for 22 March unless any delays come up, which tend to be rather common to Fedora Linux releases with F24 already having been delayed twice.
If you aren't familiar with the new functionality anticipated for Fedora 24, see the change-set Wiki page and our dozens of Fedora 24 articles.
More details on today's alpha freeze can be found via this mailing list post. Fedora 24 is currently scheduled to be officially released on 7 June.