- 1967
- March
- March 18, 1967
- After escaping from the island, Number Six manages to find his way back to London, where he finds a woman named Mrs. Butterworth living in his flat and driving his car. She informs him the date - Saturday, March 18. (episode Many Happy Returns)

- March 19, 1967
- Number Six's birthday. After escaping from the island, Number Six manages to find his way back to London, where he finds a woman named Mrs. Butterworth living in his flat and driving his car. When she informs him the date - Saturday, March 18 - he tells her that his birthday is tomorrow. (episode Many Happy Returns)

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