Journal
Write it in two times.
Every entry carries Earth UTC and the Mars sol it was true for. Useful on the ground, in cruise, and after landing.
Ship's log
Mission journal
Chronometers
Two worlds, one instant
Earth · UTC
00:00:00
Thu Jan 1 1970
Mars · MTC
07:04:53
MSD 34127.295
Curiosity sol 0 · Perseverance sol 0 · Ls 315.0°
Navigator
Today's brief
A short reading of this epoch from your station. Uses the live almanac numbers — it will not invent a weather report.
Stationed on Earth.