Sylvester Randolph writes to the West Jersey Pioneer about the "Holidays" while in the Army. Christmas Day was spent on the picket line and their feast was a goose boiled, with I would guess some Hardtack and bad cup of coffee, Click the link below to read the letter on the Library of congress' website!

https://chroniclingamerica.loc.gov/lccn/sn83032103/1862-01-11/ed-1/seq-2/