just figured this out and i’m super excited~~~
So you know when you’re reading through general tumblr tags and the url looks like this (this is the url going one page back in that tag, from today, 3/30/2013):
Turns out the number at the end means something, and can be changed so you can go to the general tumblr tags for any date you specify.
For instance, if I want to go the one direction tag as of January 1, 2012, I would go to http://www.timestampgenerator.com, enter the date, and this number would be generated:
I replace the number in the above url with this number, to get this url:
And now I can see everything people tagged with “one direction” around the time of January 1, 2012. If you care about the exact timing, remember to specify your time zone (in GMT +/-x) and take note of the time zone that shows up by default on posts in dashboard mode (in xkit, you can set the time zone to your own with the ‘timestamp’ extension, other scripts and extensions may work differently).
What this number means (roughly) is the number of seconds that have passed since midnight January 1, 1970, GMT. It is also called Unix time and is a standard way of calculating timestamps for anything that is unix-based.