Hi gb,
No, daylight saving is not an issue when comparing UTC date & time to UTC date & time.
At 12:36 UTC on Jan 8th Titan is at second contact, that is the disk of Titan is on the disk of Saturn and their limbs are in contact, just after the start of the transit.
At that time, according to The Sky 6, Mimas is transiting the disk of Saturn very close to the ring plane, probably in the EZn (Equatorial Zone north) on the far eastern side of the planet.
Regards
Trevor
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