In one scene of Disney's Aladdin, Genie calls Al's clothes "so last century". Genie was trapped in the lamp for 10,000 years, so there is no way he could have known about the fashion trends which could have happened whilst he was in the lamp. Which means the latest Genie could have been trapped in the lamp during the 3rd century. If he spent 10,000 years in the lamp, it is then at least 10,300 AD when he gets out.

Aladdin takes place in the future, or more exact, a post-apocalyptic world where only Arabic (and some Greek) survived. Its been so long that the name "Arabia" has been corrupted into "Agrabah". The Islamic religion has atrophied to the point where there are no mosques, imams or prayer mats, but people still give praise to Allah in moments of happiness. Amazing technological marvels left behind by the previous civilization, like flying carpets or genetically engineered parrots which can comprehend human speech instead of just mimicking it, are taken for granted by locals or considered “Magic”. The Genie proves this by making impressions of ancient, long-dead celebrities like Groucho Marx, Jack Nicholson, etc."

In addition to this, in the Aladdin genesis video game there's a modern-day stop sign buried in the sand, as well as a number of bones/skeletons and even a none active warhead in a cave