Bad math, or am I missing something?
Taylor arrives in September 1967.
While cleaning the latrines, another soldier says he has 92 days left and is leaving on April 17. That puts the story in mid-January 1968.
But a moment later, Taylor says he still has 332 days left. If it's a 365-day tour, that puts the story in October 1967.
Live long and prosper.