Quote:
Originally Posted by Jove
I think it is a story arc for time travel since John, Sarah and company seem to travel between times. I would assume they would use the year instead of the month, but I guess they had to make things easier.
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the traveling between time seems to be a one time only thing. i think when they did it the first time, they said that it'd taken years for the operative who built the time travel device to build it.
i think it's just a code to prove they're who they say they are.