Consider using standardized variables defined by schema.org

[NGenetzky]

Consider using more standarized definitions for the start date and the end date (dob/dod,birth/death).

example

now:

dob: 2016-06-20
# dod: 2020-06-20 # overwrite lifespan
lifespan: 4

suggestion 1

date: 2016-06-20T10:00:00
#endDate: 2020-06-20T12:00:00
#duration: P4Y

Reference schema.org

duration	Duration	The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format.
Date  or DateTime	The end date and time of the item (in ISO 8601 date format).
startDate	Date  or DateTime	The start date and time of the item (in ISO 8601 date format).
--	--	--

duration Duration The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format. endDate Date or DateTime The end date and time of the item (in ISO 8601 date format). startDate Date or DateTime The start date and time of the item (in ISO 8601 date format).