Wintergrasp Timer 

In ConvertSecondsToHourMinute():
    if GetCVarBool("timeMgrUseMilitaryTime") then
        for i=1, hours/24 do if hours >= 24 then hours = hours - 24 end end
    else
        for i=1, hours/12 do if hours > 12 then hours = hours - 12 end end
    end

--[[
Notes of the changes by MikeNGo:
I think my changes were done to beta8, but I do not know for sure as the version in the .toc just says 'beta', I do know it is not beta9 I altered; note it would be nice to update the version in the .toc 
The objective of my  changes were to add in hour:minute format the hour and minute that the next WG battle would land on.
The altered code (noted by '--Added by MikeNGo') is what I changed
Note that there is a problem with a rounding error, so the minute time might bounce between a moment and the moment before or after it
Also, the sound and MSBT addition are in this reversion
Due to a few stupid wrong assumptions I made, so it took me a long time to make this change, lol, so here is what I got so far
Note what I have done is more or less a proff of concept; the idea needs a bit of ironing out
BTW, Mikma, I took you saying, "4) Not sure is this one needed :I," to my sudjustion that you repplied to as, "Not sure if I want to bother implementing that," so I just did it for you =]
Enjoy, and you may use my changes in improving your addon
]]

if not WGTime then WGTime = 0 end

local NPC1,NPC2,text1,text2,text3,text4,text5,text6,text7,text8,tooltip1,tooltip2,tooltip3,tooltip4,tooltip5,tooltip6,tooltip7

if GetLocale() == "deDE" then
    -- Thank you dingsbums @ wowinterface.com
    NPC1 = "Arkanist Braedin"
    NPC2 = "Magister Surdiel"
    text1 = "Tausendwinter beginnt in 15 Minuten"
    text2 = "Tausendwinter beginnt in 5 Minuten"
    text3 = "Die Schlacht um Tausendwinter startet in: "
    text4 = "Tausendwinter Timer: Die Schlacht startet in "
    text5 = "Tausendwinter Timer: Die Schlacht hat begonnen!"
    text6 = "Tausendwinter Timer: Am Zur¸cksetzen und Abfragen der Zeit."
    text7 = "N‰chste Schlacht:"
    text8 = "Tausendwinter Timer:"
    tooltip1 = "Echtzeit:"
    tooltip2 = "Blizzardzeit:"
    tooltip3 = "Shift+Linke Maustaste"
    tooltip4 = "Die Zeit im Chat bekanntgeben."
    tooltip5 = "Shift+Rechte Maustaste"
    tooltip6 = "Zur¸cksetzen und bekannte Zeit abfragen."
    tooltip7 = "Time when battle will start at: "--Added by MikeNGo
else
    NPC1 = "Arcanist Braedin"
    NPC2 = "Magister Surdiel"
    text1 = "Wintergrasp will begin in 15 minutes"
    text2 = "Wintergrasp will begin in 5 minutes"
    text3 = "Battle of Wintergrasp starts in: "
    text4 = "Wintergrasp Timer: Battle will begin in "
    text5 = "Wintergrasp Timer: Battle has begun!"
    text6 = "Wintergrasp Timer: Resetting and requesting time"
    text7 = "Next Battle:"
    text8 = "Wintergrasp Timer:"
    tooltip1 = "Fixed Time:"
    tooltip2 = "Blizzard Time:"
    tooltip3 = "Shift+LeftButton"
    tooltip4 = "Announce the time in chat input."
    tooltip5 = "Shift+RightButton"
    tooltip6 = "Reset and request known time."
    tooltip7 = "Time when battle will start at: "--Added by MikeNGo
end
                         
local TIMEFIX,updateperiod,elapsed,output,h,m,s,timer = 1.025,1,0
local brokertext = text8

WGTbroker = LibStub("LibDataBroker-1.1"):NewDataObject(brokertext, {
    type = "data source",
    text = "N/A",
    icon = "Interface\\Icons\\INV_Jewelry_Ring_66",
    OnClick = function(self, button)
        if IsShiftKeyDown() then
            if button == "LeftButton" and WGTime > 0 then
                ChatFrameEditBox:Show()
                ChatFrameEditBox:SetText(text3..output)
            elseif button == "RightButton" then
                print(text6)
                WGTime = 0
                if IsInGuild() then SendAddonMessage("WGTime", "timerequest", "GUILD") end
                if UnitExists("party1") then SendAddonMessage("WGTime", "timerequest", "PARTY") end
                if UnitExists("raid1") then SendAddonMessage("WGTime", "timerequest", "RAID") end
            end
        end
    end,
    OnEnter = function(self)
        local originaltime = timer/TIMEFIX
        local h1,m1,s1 = ConvertSeconds(timer)
        local h2,m2,s2 = ConvertSeconds(originaltime)
        local h3,m3,s3 = ConvertSecondsToHourMinute(timer)--Added by MikeNGo
        GameTooltip:SetOwner(self, "ANCHOR_NONE")
        GameTooltip:SetPoint("TOPLEFT", self, "BOTTOMLEFT")
        GameTooltip:ClearLines()
        GameTooltip:AddLine(text8,0,1,0)
        if WGTime-time() > 0 then
            GameTooltip:AddLine("------------------------------------",1,1,0)
            GameTooltip:AddDoubleLine(tooltip1,h1.."h "..m1.."m "..s1.."s",1,1,0)
            GameTooltip:AddDoubleLine(tooltip2,h2.."h "..m2.."m "..s2.."s",1,1,0)
            GameTooltip:AddDoubleLine(tooltip7,h3..":"..m3,1,1,0)--Added by MikeNGo
            GameTooltip:AddLine("------------------------------------",1,1,0)
        end
        GameTooltip:AddDoubleLine(tooltip3,tooltip4)
        GameTooltip:AddDoubleLine(tooltip5,tooltip6)
        GameTooltip:Show()
    end,
    OnLeave = function()
        GameTooltip:Hide()
    end,
})

function ConvertSeconds(value)
    local hours = floor(value / 3600)
    local minutes = value - (hours * 3600)
    minutes = floor(minutes / 60)
    local seconds = floor(value - ((hours * 3600) + (minutes * 60)))
    if hours > 0 then return hours,minutes,seconds
    elseif minutes > 0 then return 0,minutes,seconds
    else return 0,0,seconds
    end
end

--Added by MikeNGo
function ConvertSecondsToHourMinute(value)
	value = tonumber(value)
	local _, currentHour, currentMinute =	GameTime_GetTime()
	local currentSecond = 0
	
	if GetCVar("timeMgrUseLocalTime") == 1 then
		currentHour = date"%H"
		currentMinute = date"%M"
		currentSecond = date"%S"
	else
		currentHour, currentMinute = GetGameTime()
		currentSecond = date"%S"
	end
	
	value = value + (currentSecond+(currentHour*3600)+(currentMinute*60))

    local hours = floor(value / 3600)
    local minutes = (hours * 3600) - value
    minutes = floor(minutes / 60)
    local seconds = floor( ((hours * 3600) + (minutes * 60)) - value )

	
  	minutes = math.abs(minutes)--Because it sometimes is negative, and the abs value is what we want

    if GetCVarBool("timeMgrUseMilitaryTime") then
    	for i=1, hours/24 do
			if hours > 24 then
				hours = hours - 24
			end
    	end
	else
		for i=1, hours/12 do
			if hours > 12 then
				hours = hours - 12
			end
		end
    end

    if hours > 0 then return hours,minutes,seconds
    elseif minutes > 0 then return 0,minutes,seconds
    else return 0,0,seconds
    end
end



local function broadcast(arg1)
    if IsInGuild() then SendAddonMessage("WGTime", arg1, "GUILD") end
    if UnitExists("party1") then SendAddonMessage("WGTime", arg1, "PARTY") end
    if UnitExists("raid1") then SendAddonMessage("WGTime", arg1, "RAID") end
end

local frame = CreateFrame("Frame")
frame:SetScript("OnUpdate", function(self, elap)
    timer = WGTime-time()
    elapsed = elapsed + elap
    if elapsed <= updateperiod then return end
        timer = timer - elapsed
        if timer > 0 then
            local hours,minutes,seconds = ConvertSeconds(timer)
            if hours > 0 then output = hours.."h "..minutes.."m"
            elseif minutes > 0 then output = minutes.."m "..seconds.."s"
            else output = seconds.."s"
            end
        else
            output = "N/A"
            WGTime = 0
        end
        
        --Added by MikeNGo
        if output == "15m 0s" or output == "5m 0s" then 
            print(text4..output) 
			if ( MikSBT and ( not ( MikSBT.IsModDisabled() ) ) ) then
				MikSBT.DisplayMessage(text4..output)
			else
				UIErrorsFrame:AddMessage(text4..output)
			end
			PlaySound'ReadyCheck'
		
        elseif output == "0s" then 
            print(text5)
			if ( MikSBT and ( not ( MikSBT.IsModDisabled() ) ) ) then
				MikSBT.DisplayMessage(text5)
			else
				UIErrorsFrame:AddMessage(text5)
			end
			PlaySound'ReadyCheck'

        end
        
        --Added by MikeNGo
        if output ~= "N/A" then
            local hours,minutes,seconds = ConvertSecondsToHourMinute(timer)--SecondsToTime(WGTime-time()))
            
        	output = hours..":"..minutes.." - "..output
        end
        
        WGTbroker.text = output
    elapsed = 0
end)

frame:RegisterEvent("GOSSIP_SHOW")
frame:RegisterEvent("CHAT_MSG_MONSTER_YELL")
frame:RegisterEvent("CHAT_MSG_ADDON")
frame:RegisterEvent("PLAYER_ENTERING_WORLD")
frame:RegisterEvent("UPDATE_WORLD_STATES")
frame:SetScript("OnEvent", function(self,event,...)
    if event == "GOSSIP_SHOW" then
        if (UnitName("target") == NPC1 or UnitName("target") == NPC2) and GetGossipText():match("%d:%d%d:%d%d") then 
            h,m,s = string.split(":",GetGossipText():match("%d:%d%d:%d%d"))
            timer = h*3600+m*60+s
            local fixedtime = floor(timer*TIMEFIX)
            WGTime = time() + fixedtime
            broadcast(fixedtime)
        elseif (UnitName("target") == NPC1 or UnitName("target") == NPC2) and not GetGossipText():match("%d:%d%d:%d%d") then
            WGTime = 0
        end
    elseif event == "CHAT_MSG_MONSTER_YELL" then
        local message,name = ...
        if name == NPC1 or name == NPC2 then
            if string.match(message,text1) then
                local fixedtime = floor(900*TIMEFIX)
                WGTime = time() + fixedtime
                broadcast(fixedtime)
            elseif string.match(message,text2) then
                local fixedtime = floor(300*TIMEFIX)
                WGTime = time() + fixedtime
                broadcast(fixedtime)
            end
        end
    elseif event == "CHAT_MSG_ADDON" then
        local prefix,message = ...
        if prefix == "WGTime" then
            if message == "timerequest" then
                if WGTime > 0 then broadcast(WGTime-time()) end
            else
                if WGTime == 0 then WGTime = (time() + message) end
            end
        end
    elseif event == "UPDATE_WORLD_STATES" then
        if AlwaysUpFrame2 and AlwaysUpFrame2:IsShown() and AlwaysUpFrame2Text:GetText():match(text7) and WGTime == 0 then
            local timeString = AlwaysUpFrame2Text:GetText():match("%d:%d%d:%d%d")
            if timeString then
                local h,m,s = string.split(":",timeString)
                local fixedtime = floor((h*3600+m*60+s)*TIMEFIX)
                WGTime = time() + fixedtime
                broadcast(fixedtime)
            end
        end
    else
        if WGTime == 0 then
            if IsInGuild() then SendAddonMessage("WGTime", "timerequest", "GUILD") end
            if UnitExists("party1") then SendAddonMessage("WGTime", "timerequest", "PARTY") end
            if UnitExists("raid1") then SendAddonMessage("WGTime", "timerequest", "RAID") end
        end
    end
end)