User blog comment:Wikiyous/Request or Challenge Blog/@comment-5069123-20130406151607/@comment-4631119-20130406152811

Well, first thing I need to ask: how far have you read the novels?

As you mentioned before, some of the events even have nothing announced than a vague time estimation such as "few weeks", "several days", etc. The rest events are divided into three class: event with exact date (sometimes even included time), event with month and year only and event with year only.

Also, there is nowhere in the main novel of SAO nor ALO that Kirito nor Asuna mentioned about their levels in numbers during certain events. All of their levels is revealed only during sidestories (like event with Silica, Sachi, Lizbeth, 1st Floor Boss, etc.), from the Progressive or from the anime, but in most cases, reader must guess their level based on given formula that their level as frontliners are averagely 15-20 level higher than the floor level.

This challange you opened, with all criteria you explained and demanded (all exact date, level progression, etc.), is impossible to be done other than Kawahara Reki himself. The best thing we can do, I think, just fill in up to the timeline we've got already, for the missing data (if any), but we can't do nor guess exactly when it's not provided by the novel explicitly.

Lastly, to keep the data accuracy, I always refrain from guessing date from event with vague time details, and encourage others to do so as well.