Holiday Happenings events will be held across Ponca City this weekend. The Marland Estate Mansion, located at 901 Monument Rd., is kicking-off the Holiday Happening Weekend in Ponca City with a candlelight tour on Friday from 5:30 to 7:30 p.m. The tour will be self-guided to see and ejjoy the new Christmas decor and over 10 exquisitely decorated Christmas trees. All floors of the 55-room estate…