The Liberal government of Prime Minister Lester B. Pearson in 1965 first established the Canadian Pension Plan.\n\nBased on this passage, when did the old age pension start in canada?
Step-by-step reasoning:
1965
The relevant sentence in the passage is: The Liberal government of Prime Minister Lester B.

Pearson in 1965 first established the Canadian Pension Plan.

.

So, the final answer is 1965