summer

an Indian summer

1. a period of warm weather which sometimes happens in early autumn. Both the UK and Ireland have been enjoying an Indian summer over the past few weeks.

2. a successful or pleasant period in someone's life, especially towards the end of their life. The book describes the last 20 years of Churchill's life, including his Indian summer as prime minister between 1951 and 1955.

one swallow doesn't make a summer (British & Australian)

something that you say which means because one good thing has happened, you cannot therefore be certain that more good things will happen and the whole situation will improve. Okay, they won their last game but one swallow doesn't make a summer. They're still bottom of the league.

See also: doesn't, swallow