Biden's Nomination: When is the Democratic National Convention?

For the upcoming U.S. presidential election in November, the Republican Party has officially nominated Donald Trump as their candidate. When Biden will be officially announced as a Democrat candidate? Will he be the candidate at all? The question is being discussed as uncertainty looms large over his candidature since the first Presidential debate. Let's know about when the Democratic Convention will take place and whether Biden will be announced as the candidate over there.