New Yahoo Finance URL

Since the previous Yahoo Finance download URL is not working anymore, I are now left with something like this:

https://query1.finance.yahoo.com/v7/finance/download/AAPL?period1=1492524105&period2=1495116105&interval=1d&events=history&crumb=tO1hNZoUQeQ

Does anybody know how the period1 (and period2) translate into a date (and viceversa)

Any help appreciated!

Thanks!