It's decided by the cheers received over one month (1st to last day, Korea time). A cheer for the whole team adds to every member's card.
The first member whose card reaches 2,000 (level 5 — the completed Taegeuk flag) becomes Idol of the Month.
If no one reaches 2,000 that month, there is no Idol of the Month — it has to be earned.
Reward: featured at the top of the K-Pop section on the K-Sarangbang home page for the whole following month.
Cheers for the same member count once every 2 hours.

Photos: 티비텐 TV10 · CC BY 4.0 / YuwarinPop · CC BY 3.0 / GOM · CC BY 4.0 · Wikimedia Commons

🎤Concerts

D-52026-2027 WORLD TOUR [XX : COSMOS] IN SYDNEYSat, Oct 31 · Accor Stadium, SydneyBuy tickets
D-122026-2027 WORLD TOUR [XX : COSMOS] IN BANGKOKSat, Nov 7 · Rajamangala National Stadium, BangkokBuy tickets
D-132026-2027 WORLD TOUR [XX : COSMOS] IN BANGKOKSun, Nov 8 · Rajamangala National Stadium, BangkokBuy tickets
D-182026-2027 WORLD TOUR [XX : COSMOS] IN HONG KONGFri, Nov 13 · Kai Tak Stadium, Hong KongSold out
D-192026-2027 WORLD TOUR [XX : COSMOS] IN HONG KONGSat, Nov 14 · Kai Tak Stadium, Hong KongSold out
D-202026-2027 WORLD TOUR [XX : COSMOS] IN HONG KONGSun, Nov 15 · Kai Tak Stadium, Hong KongSold out
D-222026-2027 WORLD TOUR [XX : COSMOS] IN HONG KONGTue, Nov 17 · Kai Tak Stadium, Hong KongSold out
D-322026-2027 WORLD TOUR [XX : COSMOS] IN OSAKAFri, Nov 27 · Kyocera Dome Osaka
D-332026-2027 WORLD TOUR [XX : COSMOS] IN OSAKASat, Nov 28 · Kyocera Dome Osaka
D-342026-2027 WORLD TOUR [XX : COSMOS] IN OSAKASun, Nov 29 · Kyocera Dome Osaka
D-402026-2027 WORLD TOUR [XX : COSMOS] IN NAGOYASat, Dec 5 · Vantelin Dome Nagoya
D-412026-2027 WORLD TOUR [XX : COSMOS] IN NAGOYASun, Dec 6 · Vantelin Dome Nagoya
D-482026-2027 WORLD TOUR [XX : COSMOS] IN TOKYOSun, Dec 13 · Tokyo Dome
D-492026-2027 WORLD TOUR [XX : COSMOS] IN TOKYOMon, Dec 14 · Tokyo Dome
D-502026-2027 WORLD TOUR [XX : COSMOS] IN TOKYOTue, Dec 15 · Tokyo Dome
D-612026-2027 WORLD TOUR [XX : COSMOS] IN FUKUOKASat, Dec 26 · Mizuho PayPay Dome Fukuoka
D-622026-2027 WORLD TOUR [XX : COSMOS] IN FUKUOKASun, Dec 27 · Mizuho PayPay Dome Fukuoka
D-752026-2027 WORLD TOUR [XX : COSMOS] IN KUALA LUMPURSat, Jan 9, 2027 · TM Stadium Nasional, Kuala LumpurSold out
D-762026-2027 WORLD TOUR [XX : COSMOS] IN KUALA LUMPURSun, Jan 10, 2027 · TM Stadium Nasional, Kuala LumpurBuy tickets
D-822026-2027 WORLD TOUR [XX : COSMOS] IN JAKARTASat, Jan 16, 2027 · Jakarta International Stadium, JakartaSold out
D-832026-2027 WORLD TOUR [XX : COSMOS] IN JAKARTASun, Jan 17, 2027 · Jakarta International Stadium, JakartaBuy tickets
D-1172026-2027 WORLD TOUR [XX : COSMOS] IN MANILASat, Feb 20, 2027 · SMDC Festival Grounds, ManilaBuy tickets
D-1242026-2027 WORLD TOUR [XX : COSMOS] IN KAOHSIUNGSat, Feb 27, 2027 · Kaohsiung National Stadium, KaohsiungBuy tickets
D-1252026-2027 WORLD TOUR [XX : COSMOS] IN KAOHSIUNGSun, Feb 28, 2027 · Kaohsiung National Stadium, KaohsiungBuy tickets