When does Schumer(D-NY) become US Senate Majority Leader? 1/20/2021 or 1/2/2023?

Schumer(D-NY) becomes US Senate Majority Leader on 1/20/2021 if Ossoff(D-GA) and Warnock(D-GA) win the GA US Senate Election Runoff tomorrow. Biden/Harris-D get inaugurated on 1/20/2021.
Schumer(D-NY) becomes US Senate Majority Leader on 1/2/2023 if Democrats win only 1 GA US Senate Election tomorrow.
Democrats guide to regaining control of the US Senate in 2023.
36)GA(Ossoff-D) not up for re-election in 2022.
36/37)VT(Leahy-D)
37/38)HI(Schatz-D)
38/39)CA(Padilla-D)
39/40)NY(Schumer-D)
40/41)MD(Van Hollen-D)
41/42)CT(Blumenthal-D)
42/43)OR(Wyden-D)
43/44)IL(Duckworth-D)
44/45)WA(Murray-D)
45/46)CO(Bennet-D)
46/47)NH(Hassan-D) vs Sununu-R
47/48)NV(Cortez Masto-D) vs Sandoval-R
48/49)AZ(Kelly-D) vs Ducey-R
49/50)GA(Loeffler-R vs Warnock-D)rematch
50/51)PA(OPEN Toomey-R)Fetterman-D or Shapiro-D