We provide a rationale for the growing phenomena of calendars for issues of government bonds and of independent agencies of debt management. In our analysis, both phenomena emerge as a solution to a time-inconsistency bias to issue illiquid bonds. Because debt managers wish to take views on the market to reduce the cost of financing, they must sacrifice some liquidity in the secondary market, as liquidity creation is slow to achieve. Markets expect that behavior and reduce the liquidity premium. We provide some stylized facts on how the United States, France and Italy have tackled this problem.