Mercury at its farthest from the Sun, on the next date that lifts it clear of your horizon. The arc is that distance, and it never passes 28°. So look low, in the glow, at the time the readout gives.
A March dusk, facing west. The line is the ecliptic, and Mercury is always near it. North of the equator it climbs steeply out of the sunset, at 90° minus your latitude plus 23.4°, so a planet on it stands above the set Sun, not beside it.
September, facing west again. Now the ecliptic leans along the horizon, at 90° minus your latitude minus 23.4°: a planet on it lies off to the side, barely clear of the ground. South of the equator the two swap, and mornings run the other way.
A year of Mercury's angle from the Sun: evenings up, mornings down. Three or four swings each side a year, turning back at about 18° to 28°: its orbit is lopsided.
The dashed line is how high it stands from here with the Sun 6° down. The steep ecliptic lifts it, the shallow one buries it. In the north, hunt it on spring evenings and autumn mornings.