local Jobs     = {}
local LastTime = nil

function RunAt(h, m, cb)
    table.insert(Jobs, {
        h  = h,
        m  = m,
        cb = cb
    })
end

function GetTime()
    local timestamp = os.time()
    local d         = os.date('*t', timestamp).wday
    local h         = tonumber(os.date('%H', timestamp))
    local m         = tonumber(os.date('%M', timestamp))

    return {d = d, h = h, m = m}
end

function OnTime(d, h, m)
    for i = 1, #Jobs, 1 do
        if Jobs[i].h == h and Jobs[i].m == m then
            Jobs[i].cb(d, h, m)
        end
    end
end

function Tick()
    local time = GetTime()

    if time.h ~= LastTime.h or time.m ~= LastTime.m then
        OnTime(time.d, time.h, time.m)
        LastTime = time
    end

    SetTimeout(60000, Tick)
end

LastTime = GetTime()
Tick()

AddEventHandler('cron:runAt', function(h, m, cb)
    RunAt(h, m, cb)
end)

TriggerEvent('cron:runAt', 23, 5, function()
    print("Test")
end)