Adding record label and release date
If your track is released under a record label, with a specific release date you can add both of these to the track through the Metadata tab of your track's edit page. You can access your edit page at any time by going to the pencil icon below it's waveform.
Please note: The release date will be under the GMT time zone. This means that if you are outside of this time zone, the day may look different.