How to calculate time interval(time difference) between two Date columns(variables)— Hacking R

INGREDIENTS:

Let’s create a data frame that contains two columns “Manufacturing Date”

INSTRUCTIONS:

Check the data type of columns. If columns are not “Date” type, then convert the type as “Date” using “as.Date” function.

Calculate time interval between “manufacturing_date” and “expiration_date”. Then, convert the time interval from days to months, and years.

Done!