Give Yangnim-dong daylight for its historic lanes, then use a separate evening for Sajik Park Observatory. The two-stop plan works best when you decide the return before dinner.
Day one: Yangnim-dong on foot
The historic village is listed as free and open throughout the day; workshops have separate hours and may close on Mondays. Keep the walk to a compact area around the buildings or craft street you want to see. The city lists Namgwangju Station about a 12-minute walk away and several bus routes serving the area; check the city's Yangnim-dong visitor details for current access and parking.
Day two: time the observatory, not just sunset
Sajik Park Observatory is at 49 Sajik-gil. Gwangju's current listing gives hours of 09:00–22:00 from March through November and 09:00–21:00 from December through February. It lists no parking at the observatory, so plan the final bus or taxi connection before the visit. Check the official observatory listing for updates.
Keep the evening short enough for the return
Choose dinner near the route you will take back, then visit the observatory within its listed hours. If the group reaches Sajik late, shorten the meal or skip an extra stop; do not rely on an assumed last bus or on a seasonal sunset time.