Is There a time-of-day tweet graph out there?

[tatermarketing]

I've created a gift-guide with some big brand items on it.  I'd like to reach them when I post the gift-guide.

Is there a graph that will show me when they are active on their twitter accounts?

[SEO5Team]

You can try some of the social media analytics tools below that will give you an insight on the brands you are following:

followerwonk

crowdbooster

sproutsocial

[tatermarketing]

And one of these tools will tell me when each brand is the most active?

[SEO5Team]

yep try crowdbooster , they give you a summary of your own activity in terms of busiest days of the week as well as that of the followers and the ones that you are following.