Execute a function when time is 21:00

[DRW]

So I want to execute a function when time is 21:00 (in-game). I've been looking at the wiki for getTime, but I don't understand what to do, it just gives an example of how to get the current time, not how to get a specific time and execute a function.

[WhoAmI]

setTimer(function() 
local h, m = getTime() 
if h == 21 and m == 0 then 
-- tod 
end 
end, 1000, 1 ) 

[DRW]

setTimer(function() 
local h, m = getTime() 
if h == 21 and m == 0 then 
-- tod 
end 
end, 1000, 1 ) 

Thanks!