Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| # | Date | Visitor | Score | Home | Record | Pts |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | December 21 | Ottawa Senators | 5–2 | Montreal Canadiens | 1–0–0 | 2 |
| 2 | December 26 | Toronto Arenas | 2–5 | Ottawa Senators | 2–0–0 | 4 |
| 3 | December 31 | Ottawa Senators | 2–4 | Toronto Arenas | 2–1–0 | 4 |
| 4 | January 2 | Montreal Canadiens | 2–7 | Ottawa Senators | 3–1–0 | 6 |
| 5 | January 4 | Ottawa Senators | 2–5 | Montreal Canadiens | 3–2–0 | 6 |
| 6 | January 9 | Toronto Arenas | 2–4 | Ottawa Senators | 4–2–0 | 8 |
| 7 | January 14 | Ottawa Senators | 2–5 | Toronto Arenas | 4–3–0 | 8 |
| 8 | January 16 | Montreal Canadiens | 10–6 | Ottawa Senators | 4–4–0 | 8 |
| 9 | January 18 | Ottawa Senators | 3–5 | Montreal Canadiens | 4–5–0 | 8 |
| 10 | January 23 | Toronto Arenas | 2–3 | Ottawa Senators | 5–5–0 | 10 |
| 11 | January 25 | Ottawa Senators | 1–0 | Montreal Canadiens | 1–0–0 | 2 |
| 12 | January 28 | Ottawa Senators | 2–1 | Toronto Arenas | 2–0–0 | 4 |
| 13 | January 30 | Montreal Canadiens | 2–3 | Ottawa Senators | 3–0–0 | 6 |
| 14 | February 6 | Toronto Arenas | 1–3 | Ottawa Senators | 4–0–0 | 8 |
| 15 | February 8 | Ottawa Senators | 3–4 | Montreal Canadiens | 4–1–0 | 18 |
| 16 | February 13 | Montreal Canadiens | 0–7 | Ottawa Senators | 5–1–0 | 10 |
| 17 | February 18 | Ottawa Senators | 4–3 | Toronto Arenas | 6–1–0 | 12 |
| 18 | February 20 | Toronto Arenas | 3–9 | Ottawa Senators | 7–1–0 | 14 |
Question:
what date was the first game played?
Answer:
December 21