Lame duck period

[buritobr]

Is a long lame duck period necessary?

In the USA, there are at least 71 days between the election and the innauguration. In Brazil, there are at least 61 days if there is runoff and 83 days if there is no runoff. In Mexico, there are at least three months.
In France, there is only one week. In Greece, Tsipras started his term in the following day after the election.

Do some countries have long lame duck time because it is necessary to organize the transition? Or only because it became a tradition coming from a time where vote proceeding used to take several days?

[buritobr]

When the lame duck in the USA was even longer.
Comparing to the events in Germany at the same time.

Nov 6th, 1932: German Federal Election
Nov 8th, 1932: Franklin Roosevelt elected president of the USA
Dec 3th, 1932: End of Von Papen government in Germany, due to the result of the federal election. Schleicher starts a new government.
Jan 28th, 1933: End of Schleicher government. Adolf Hitler starts a new government.
Mar 4th, 1933: Innauguration of Franklin Roosevelt
Mar 5th, 1933: New German Federal Election, confirming the plurality of the NSDAP

So, Hoover lame duck government was much bigger than the whole Schleicher government