Bicyclist -- Write With (AP) Style

Is it February 7 or February 7th or Feb. 7?

In this instance, it's the latter. In AP Style under dates . . .

Always use Arabic figures, without st, nd, rd or th. See months for examples . . .

Also, under months . . .

Capitalize the names of months in all uses. When a month is used with a specific date, abbreviate only Jan., Feb., Aug., Sept., Oct., Nov. and Dec. Spell out when using alone, or with a year alone.

Also, is it 72nd St. and Southland Blvd.? Or 72nd Street and Southland Boulevard? Or Seventy-Second Street?

In this case, it was 72nd Street and Southland Boulevard. From AP Style, under "addresses":

Use the abbreviations Ave., Blvd. and St. only with a numbered address: 1600 Pennsylvania Ave. Spell them out and capitalize when part of a formal street name without a number: Pennsylvania Avenue. (Emphasis mine.) Lowercase and spell out when used alone or with more than one street name: Massachusetts and Pennsylvania avenues.

Spell out and capitalize First through Ninth when used as street names; use figures with two letters for 10th and above: 7 Fifth Ave., 100 21st St.

I strongly suggest you review AP Style information listed under the categories of addresses, dates and months.