Hello Irish.
Well i could be very wrong here, i'm sure the bro's will shoot me down if i am.:icon_cheesygrin: So do not hold me to it ok? But regarding the Lunar birthday, i think it may have something similar to do with something we say in the west called your 'rising sign' Which i like your star sign, ie like Aries/Leo etc, but what your rising sign is, depends on the constellation that was 'rising' (like the sun in the morning) at the time of your birth, so although you are born months apart, your rising sign could be the same, giving you the same birthday... Bit confusing right... :-/ but if you find out the time of your birth, on the day of your birth, you should be able to go online and find your 'rising sign' which like i say, i think will then be your lunar birthday.
And regarding the Three birthdays, Well, the Queen has two, so i'm sure sunny must be your Princess, so maybe that's why she has three birthdays....:icon_cheesygrin:
Andy...