strptime
strptime(str='-4712-01-01', fmt='%F', sg=ITALY)
public
Create a new Date object by parsing from a String according to a specified format.
str is a String holding a date representation. fmt is the format that the date is in. See date/format.rb for details on supported formats.
The default str is â-4712-01-01â, and the default fmt is â%Fâ, which means Year-Month-Day_of_Month. This gives Julian Day Number day 0.
sg specifies the Day of Calendar Reform.
An ArgumentError will be raised if str cannot be parsed.
Uses same arguments as Time#strftime
I believe this uses the same parsing format as strftime.