FEATURE: Calculate day event was added

[linwoodc3]

The events 2.0 codebook describes the fraction date. Here is the code to convert the fraction date to the approximate date when the event happened. I'm assuming I had a fraction date of 2020.2438.

import datetime

datetime.datetime(day=1,month=1,year=2020) + datetime.timedelta(days=int(2438/9999 * 365))