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Legislative Session from WikiPedia:

A legislative session is the period of time when a legislature is convened for the purpose of lawmaking. Legislatures plan their business using a legislative calendar. Unofficial but related business may be conducted by legislators outside of the session, or within the session but on days which it is not convened. Sessions of a parliament are also called parliamentary sessions.

In places where regular elections are held (without the need to dissolve a previous session), as is common to presidential systems, two sessions together are often called by the name of the body and an ordinal number -- for example, the 109th United States Congress. Other legislatures do this as well, but may define a session differently, like the 50th Parliament of the United Kingdom.

In Commonwealth realms, each session begins with a speech from the throne. Houses of Parliament in some Realms then introduce a pro forma bill, symbolising the right of Parliament to give priority to matters other than the speech and its contents. Sessions can thereafter last from a few weeks to over a year. Between two elections, there are usually anywhere from one to six sessions of parliament.

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