Hermetic Astrology on other planets

[Whitewings]

Let's suppose a mage, in a setting that uses Hermetic astrology, winds up on Mars. Clearly, the significant dates of the constellations would change, since Mars' orbit is different. But what about planetary dates? Is it always "Tuesday" or never? Does the planet itself count as a resonator? Could other planets even be invoked, or would their influence be "washed out" by Mars?

I know there are no "official" answers, so it's up to me ultimately, but I'd appreciate others' views and reasoning.