The Bar Wars were a series of contests between the regulars of Cheers and the regulars of Gary's Olde Towne Tavern. There were eight such contests, chronicled in episodes nearly all named "Bar Wars," and Cheers lost nearly all of them.
This Episode Aired on Kirstie Alley (Rebecca Howe)'s 38th Birthday
This episode aired in the month of January,1989. For that time of year the difference between Boston, Massachusetts and Greenwich, England ("zulu") is 5 hours. When Cliff says it is 2200 zulu, that would make it 5:00 p.m. in Boston.