You can use the settime command to reset the clock. You will not have a bloodmoon until the next scheduled one occurs. So if you just had the day 70 horde, and you reset time to day one, you will not have bloodmoon again until day 77. This will also affect all timers on workbenches, plants, trader stock, and zed spawning. It also has a huge chance to completely corrupt your savegame and make it un-playable.