Since it says he last logged on 130 weeks ago as of December 28, 2014, that would mean he visited 2.5 years ago. How I got this was from recalling the number of weeks in a year, namely 52 and dividing this by 12 months and getting 4.33, which is the average number of weeks in a month. After this, in order to find how long 130 weeks is, we can take 130 and divide it by 4.33. This gives us around 30. 30 is how long ago original logged on, in months. Lastly, we need to divide 30/12 which gives us how long it took him to last log o, in years. If we want to figure out additional details we can estimate that he logged in on (approximately) June 1, 2012 12:00 PM.