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Ask Alexa if the current date or any other date corresponds to an even or odd day of the year

Simply ask Alexa "Alexa ask UK Deals to get me a deal" and she will dutifully reply with one random Hot UK Deal from https://www.hotukdeals.com

Check what course is currently active on Zwift (https://zwift.com) on a particular date. Thanks to https://whatsonzwift.com for providing the schedule.

The Time Table Genius will ask you 5 different question from the time tables between 0 and 12. Try to answer all of them correctly!

Just say "Alexa, open is Christmas yet" to get how long you have to wait until Christmas.