How to interpret lastUpdated in appinfo.json ?

[TheodoreRakel]

There's a field in the appinfo.json file called lastUpdated.  Is there a way to convert this to a day, month, and year?

For example:

"lastUpdated": 1544012519539,

[KenBuja · Accepted solution]

This is the elapsed milliseconds since counting from 1 January 1970. There are conversion websites:

Milliseconds to Date Converter (ms to date since epoch) 

Current Millis ‐ Milliseconds since Unix Epoch