In 1993, while being questioned about her role in the unexplained disappearance of Ruby Morris, a teenager named Tessa claimed that Greg Randall, the father of her own unborn child and Ruby's former boyfriend, had promised her that they would be in Los Angeles by Christmas of that year. (TXF: "Conduit")
In January 1994, Dana Scully, who had since become an adult, still had her most recent Christmas tree standing inside her apartment. She told her father that she was planning on continuing to display it for the rest of the year.
Later the same month, Elizabeth Hawley told her boyfriend, Jim Summers, that on the recent Christmas Day, her family had been opening presents and doing things associated with Christmas while she had been sitting in her "own little world, thinking 'I just wish Jim were here'." (TXF: "Beyond the Sea")