Billboard Chart weeks run from Friday - Thursday. This is why albums are released on Fridays.
However, because Nielsen allows time for shipping/receipt by customers - the last day physical record sales can be counted for the first chart week is the Monday after release.
The last day for digital records to be counted on the new chart week is the following Thursday.
Digital / Physical Bundle Strategy
Therefore if you are bundling digital music with physical records, you can choose to report the digital copy. In doing so, you essentially get an extra 2 days to report first week sales.
For a detailed explanation and a calendar example, please check out our dedicated SoundScan reporting article.