independant time for custom dimension

//from server tick handler
World world2 = DimensionManager.getWorld(-64);
if (!(world2.getWorldInfo() instanceof DerivedWorldInfoOverride)) {
    DerivedWorldInfoOverride wi = new DerivedWorldInfoOverride(world2.getWorldInfo());
    c_CoroAIUtil.setPrivateValueSRGMCP(World.class, world2, "field_72986_A", "worldInfo", wi);
    wi.readFromFile();
}

//override class

package combat.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.world.storage.DerivedWorldInfo;
import net.minecraft.world.storage.WorldInfo;
import CoroAI.util.CoroUtilFile;

public class DerivedWorldInfoOverride extends DerivedWorldInfo {

    private long totalTime;
    private long worldTime;

    public DerivedWorldInfoOverride(WorldInfo par1WorldInfo) {
        super(par1WorldInfo);
        // TODO Auto-generated constructor stub
    }

    //only injects new data if found custom data
    public void readFromFile() {
        String saveFolder = CoroUtilFile.getWorldSaveFolderPath() + CoroUtilFile.getWorldFolderName() + "epoch" + File.separator;

        try {
            NBTTagCompound data = new NBTTagCompound();

            if ((new File(saveFolder + "EpochMainWorldInfo.dat")).exists()) {
                data = CompressedStreamTools.readCompressed(new FileInputStream(saveFolder + "EpochMainWorldInfo.dat"));

                readFromNBT(data);
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public void readFromNBT(NBTTagCompound par1NBTTagCompound) {
        totalTime = par1NBTTagCompound.getLong("totalTime");
        worldTime = par1NBTTagCompound.getLong("worldTime");
    }

    public void writeToFile() {
        try {

            String saveFolder = CoroUtilFile.getWorldSaveFolderPath() + CoroUtilFile.getWorldFolderName() + "epoch" + File.separator;

            //Write out to file
            if (!(new File(saveFolder).exists())) (new File(saveFolder)).mkdirs();
            FileOutputStream fos = new FileOutputStream(saveFolder + "EpochMainWorldInfo.dat");
            NBTTagCompound data = new NBTTagCompound();
            updateTagCompound(data);
            CompressedStreamTools.writeCompressed(data, fos);
            fos.close();

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private void updateTagCompound(NBTTagCompound par1NBTTagCompound/*, NBTTagCompound par2NBTTagCompound*/)
    {
        par1NBTTagCompound.setLong("totalTime", totalTime);
        par1NBTTagCompound.setLong("worldTime", worldTime);

        /*if (par2NBTTagCompound != null)
        {
            par1NBTTagCompound.setCompoundTag("Player", par2NBTTagCompound);
        }*/
    }

    @Override
    public long getWorldTotalTime()
    {
        return this.totalTime;
    }

    @Override
    public void incrementTotalWorldTime(long par1) {
        this.totalTime = par1;
    }

    @Override
    public long getWorldTime()
    {
        //System.out.println("derived time: " + worldTime);
        return this.worldTime;
    }

    @Override
    public void setWorldTime(long par1) {
        worldTime = par1;
    }

}