Stage 1: Time Traveler

Description: I can assure you that the flag was on this website at some point in time.

Going to the web page provided gives you this:

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Viewing source doesn’t provide anything interesting. The description gives me a hint to look at how the webpage may have been in the past. There are two good tools/sites for this:

http://cachedview.com/
and
http://archive.org/web/

Plugging the URL into Wayback Machine shows one saved/cache on June 1st, 2016:

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Clicking on the entry gives me exactly what I was expecting; a view of the page in the past:

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Flag = IceCTF{Th3y’11_n3v4r_f1|\|d_m4h_fl3g_1n_th3_p45t}