On this day 30 August

 British cowboy playin' rock blues.  Yup.  Works for me.

1969 30 August On This Day Led Zeppelin at Flushing Meadow NY
♪  Worried Blues (Buddy Guy) Soundcloud

• 1966 The Yardbirds - San Jose, CA 
• 1969 Led Zeppelin - Flushing Meadows, NY 

1969 Jimmy Page/Led Zeppelin at Flushing Meadow NY

1969 Jimmy Page/Led Zeppelin at Flushing Meadow NY

1969 Jimmy Page/Led Zeppelin at Flushing Meadow NY

I put this Japanese promo poster for Coverdale-Page here because I've been listening to Coverdale-Page a lot lately.

1993 Japanese Coverdale-Page promo

♪

♪  Worried Blues (Buddy Guy, Folk Festival of the Blues, 1994) YouTube
♪  Jennings Farm Blues/Rough Mix (Led Zeppelin, Remaster) YouTube
♪  Travelling Riverside Blues (Led Zeppelin) YouTube
♪  Absolution Blues (Coverdale-Page) YouTube