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u8 UpdateTimeOfDay(void) {
    s32 hours, minutes;
    RtcCalcLocalTime();
    hours = gLocalTime.hours;
    minutes = gLocalTime.minutes;

    if (hours < 6)
    {
        currentTimeBlend.time0 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.time1 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.weight = 256;
        currentTimeBlend.altWeight = 0;
        gTimeOfDay = TIME_OF_DAY_NIGHT;
        return gTimeOfDay;
    }
    else if (hours < 7)
    {
        currentTimeBlend.time0 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.time1 = TIME_OF_DAY_TWILIGHT;
        currentTimeBlend.weight = 256 - 256 * ((hours - 6) * 60 + minutes) / ((7 - 6) * 60);
        currentTimeBlend.altWeight = (256 - currentTimeBlend.weight) / 2;
        gTimeOfDay = TIME_OF_DAY_TWILIGHT;
        return gTimeOfDay;
    }
    else if (hours < 11)
    {
        currentTimeBlend.time0 = TIME_OF_DAY_TWILIGHT;
        currentTimeBlend.time1 = TIME_OF_DAY_DAY;
        currentTimeBlend.weight = 256 - 256 * ((hours - 7) * 60 + minutes) / ((11 - 7) * 60);
        currentTimeBlend.altWeight = (256 - currentTimeBlend.weight) / 2 + 128;
        gTimeOfDay = TIME_OF_DAY_TWILIGHT;
        return gTimeOfDay;
    }
    else if (hours < 17)
    {
        currentTimeBlend.time0 = TIME_OF_DAY_DAY;
        currentTimeBlend.time1 = TIME_OF_DAY_TWILIGHT;
        currentTimeBlend.weight = 256 - 256 * ((hours - 11) * 60 + minutes) / ((18 - 11) * 60);
        currentTimeBlend.altWeight = currentTimeBlend.weight / 2 + 128;
        gTimeOfDay = TIME_OF_DAY_DAY;
        return gTimeOfDay;
    }
    else if (hours < 21)
    {
        currentTimeBlend.time0 = TIME_OF_DAY_TWILIGHT;
        currentTimeBlend.time1 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.weight = 256 - 256 * ((hours - 18) * 60 + minutes) / ((22 - 18) * 60);
        currentTimeBlend.altWeight = currentTimeBlend.weight / 2;
        gTimeOfDay = TIME_OF_DAY_TWILIGHT;
        return gTimeOfDay;
    }
    else
    {
        currentTimeBlend.time0 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.time1 = TIME_OF_DAY_NIGHT;
        currentTimeBlend.weight = 256;
        currentTimeBlend.altWeight = 0;
        gTimeOfDay = TIME_OF_DAY_NIGHT;
        return gTimeOfDay;
    }
}