Right, I was mainly curious about cases when the correct digital edition release-dates are unknown.
Since those dates are typically not publicly available, hunting them down (SNS, news articles, or label websites) would seem to require a quite a bit of effort, with no guarantee that you will be able to find them.
DSP = digital service provider (e.g., iTunes, Spotify, etc).
I am just reiterating that some people did distribute music online before stores like iTunes made it easy and widespread. Release group âtokaiâ by jesus2099 - MusicBrainz is one example.
Ha ha. 
But these were demoscene (open source) modules, small files with todayâs standards, that were distributed on BBS.
Itâs not the same as commercial music that is imported from Qobuz, Deezer, Tidal, etc.
When a Beatles or Toto album in digital edition is imported with a pre-2000 date and with only links to sites that did not exist then, itâs incorrect.
Beatles and Toto did not distribute their albums on BBS, a ripped CD album would have been too big to do so, anyway.
Maybe for the few old digital releases, itâs good to mention how they were distributed.
Hello,
Iâd like to know the correct course of action for this kind of situation:
1991 Digital Media release Release group âParis ailleursâ by Ătienne Daho - MusicBrainz
1 - remove the 1991 date
2 - replace it with the remaster date: 2016 (as shown on Deezer, for example)
3 - do nothing
I run into this quite often and donât know what to do 
Thanks in advance.
éłćĽ˝ăăŚăłăăźăăťéłćĽ˝é 俥ăľă¤ăămora ď˝WALKMANÂŽĺ ŹĺźăăĽăźă¸ăăŻăšăă˘ď˝ lists a date of 2019.10.18.
âParis ailleurs (2016 Remaster) - Album by Ătienne Daho - Apple Music has an Apple ID of 1482781394. Per Feedback and support thread for the Pulsewidth a-tisket instance - #244 by yindesu that ID was assigned in 2019.
https://www.youtube.com/watch?v=bxsnkh4__io says it was provided to YouTube on âOct 17, 2019â (imprecise timezone).
So the date is almost certainly 2019-10-18 - not 2016.
I know you deleted your post, but thereâs never been a correlation between the year a remastering was done and an album release date.
It could be released in 2016 on Deezer(French)and later in 2019 in foreign countries (Appel and mora).
On top of the disconnect between remastering date and release date, this is a highly irrational position to take. Itâs incredibly unlikely that a major (Warner Music) release was only available on Deezer for 3 years before being added to Apple Music, YouTube Music, and other platforms. Iâd go as far as to say that Deezer 3-year timed-exclusive Warner Music releases has never happened before, and wonât in our lifetimes.
Googe Gemini thinks this is what happened based on the data available to the public:
In late 2019, Parlophone (a label of Warner Music France) rolled out a massive digital reissue and remastering campaign for much of Ătienne Dahoâs catalog.
Record companies doing a digital discography reissue campaign in this way is extremely common.
The removal log doesnât show my latest version.
I ended up saying Deezer said 1991 release (according to Deezer based Harmony import) for a 2016 remaster release, anyway.
But my post had no value, so I removed it.
I should keep away from digital release edits and discussion. They really give too much work for no value, for me.
Deezer doesnât do anything. It isnât the platform putting the release date.
For almost any platforms today, the release date is set through the distribution channel. It could be many things like the artists themselves with Distrokid, Amuse or else | a distributor chosen by the artist who has the digital distribution deal privilege with the platform (he individual who set the date would be an employee)
I realized that before 2008~2009 when Deezer secured distribution deals with most Majors, the releases mostly had the digital release on Deezer as a date and it still happens !
But itâs weird ; I barely see that happening with old French releases being produced, published and distributed under big majors (I mostly do French hip hop, so in the 90s/2000s). They always have the initial physical release date across all platforms.
My guess :
There is an issue with the API OR the Software wording on Deezer. Why would a release released at the same day on Deezer/Spotify/Apple Music etc. have a different release date only for Deezer ? Especially when :
So yeah, maybe itâs like something dumb like idk, [releasedate] for every platforms, but [releaseeventtime] for Deezer.
Therefore, when Deezer doesnât have any date entered on [releaseeventtime], it puts the digital upload date/todayâs date by default.
Might explain some small discrepancies of 1 day in MANY releases.
To note : I guess it doesnât happens with major recordings companies because the issue was spotted and corrected, unfortunately for us.
Having to resort Youtube upload date to have the chance* to have the initial date of digital upload.
(*youtube releases dated in 2014 = not the initial digital release date, only the date when Youtube created their disitributors API thingy akin to their competitors).
Thanks for your advice and the correction 
However if we assume that you canât find a better source (or donât want to bother, which is completely reasonable), I think the second-best option is to leave the date blank. Itâs definitely preferable to âguessingâ a date based on a remastering or something similar, and metadata consumers can still fall back to the earliest release date in the release group (which is what most people want for their metadata purposes anyway).
I suspect a lot of these may be time zone issues, too.