The original Release Date is what enables a DSP to appropriately catalogue a track or album and put them into chronological order in which they were released. The following dates can be communicated:

There are additional date fields that have been deprecated and should not be used any more:

For the avoidance of doubt: none of these dates should be used for determining if a Release may be made available – this is solely(!) determined by the start and end dates/datetimes in the Deal composite.