Abdullah teaches Neville the Barbados lesson
Date (happened)
1933
stated · preferred
Why
His 'I am almost now 67' in the same passage is consistent with the lecture's own reconstructed December 1971 delivery date (66th birthday Feb 1971, 67th not until Feb 1972), so nothing here contradicts the telling date.
Reasoning
Neville states the year 1933 directly for when Abdullah taught him the lesson; no month or day is given. This is read straight off the source, so it takes no confidence ceiling.
Told / reported
10 December 1971
estimated · probable
Reasoning
The lecture's sole delivery claim (d0, probable) reconstructs Friday 1971-12-10 from Neville being almost 67, Christmas being two weeks away, and a matching Monday-4-October-opening/Monday-10-January-reopening season schedule; the telling of this Abdullah story inherits that same probable confidence, no higher.