In the last day of the International Year of Astronomy - in the early evening of the 31st December - the Moon undergoes the smallest partial eclipse that we have seen in Ireland for 40 years - in that the Moon will only just dip into the umbral shadow of the Earth. At mid-eclipse (19:23) the lower right of the Moon may just be seen to have a faint ruddy colour as indicated in the diagram. The Moon begins to enter the penumbral shadow at 17:17, and will thus begin to darken. A small part of the Moon at its lower right enters the umbral shadow at 18:52 and leaves it at 19:52 with mid-eclipse being at at 19:23. Incidently, this is a "Blue Moon" - the name now given for the second full-moon within a calender month.
Have a look at the Jordrell Bank website to find out what else to see on the night sky in December.