Do you burn spirit money and incense to honor the dead at any time during the year?
I often laugh at this and think how superstitious. Then I think about the all the customs in Ireland which have been intermingled with Christianity.
The first christians in ireland borrowed everything that they saw around them, so much so that the leading monks and missionaries in Europe (which happened to be from Ireland in the 10th century) also wrote books about sea monsters etc. The monks wrote the famous book of kells, gospels of st. John. If you look at the book of kells it's full of images from the superstitions and mythology of the ancient kells, it's really a wondrous sight.
Now to more modern traditions adhered to by many roman catholics at home. We have All Saints days which incorporates Halloween. Halloween is the night of the undead in Ireland and the bonfires we burn are to scare away the bad spirits. We also have the fireworks and general mayhem to go with it. There are still many fairy rings (bronze age forts) in fields where God fearing farmers would never disturb the earth!
There is also the legend of the shamrock and the belief that St. Patrick (supposedly the first christian in ireland drove out the snakes as being representatives of the devil). You can also see St Brigid's Cross which is like a swastika shaped cross , St Brigid was an ancient Celtic deity. My grandmother half believes in the BanShee but she's being going to church all her life. To many people Christianity is a code of life but it doesn't cover all the parts of our cultures or the richness of our own traditions. Plus there is nothing in the bible that says monsters and fairies and other types of beings don't exist, as far as I know. My guess is the bible used to contain a lot more of that stuff but it probably got edited out along the way.
This is just Ireland. If you go to any other country in the world local christians will intermingle their customs and beliefs quite happily with the belief of an omnipresent being. I guess if you grow up in this environment it is easier to understand and totally acceptable. Each to their own.