That's really scraping the barrel
- The story behind it is Middle Eastern
- The date probably comes from mixing Jesus' birth with Germanic solstice rituals
-Santa Claus is nothing but an adaption of St Nikolas/Sinter Claas
- Giving presents has been done before too in connection with Christmas, the only thing the US maybe added is the specific date
So you basically celebrate it a bit differently, but that's a pretty weak criteria to call a holiday original.