For what it's worth the bit about Minuette/Colgate having time magic is actually official by a couple sources. Hasbro released a glitter version of the toy with her image in May 2012 and a non-glitter version in June 2012. In the US version the card that came with her said "MINUETTE is always on time with the help of some magic!" and although not from Hasbro, Series 2 of Enterplay's trading cards includes a card featuring Minuette with the description "Minuette is always on schedule thanks to her magic, and ponies say she's good enough to lord over time itself!". So irregardless of her backstory her having time magic is cannon.