Here's a look at the week ahead on our "Sunday Morning" Calendar:

Monday is opening day of the week-long National Hobo Convention in Britt, Iowa.

• National Hobo Convention, Britt, Iowa (Aug. 3-9)
• hobo.com
• Hobo Museum, Britt, Iowa

On Tuesday, President Obama celebrates his 54th birthday.

• President Barack Obama (whitehouse.gov)

Wednesday is National Oyster Day ... a day for fans of the bivalve mollusk to savor its taste and its health benefits.

• nationaloysterday.com
• Oyster Festivals in the U.S. and Canada:
  
  • Tyne Valley Oyster Festival, Prince Edward Island (July 29-Aug. 2)
  • Millford Oyster Festival, Millford, Conn. (Aug. 15)
  • New York Oyster Week, New York City (Sept. 10-27)
  • Shock Top Oyster Fest, Chicago, (Sept. 11-12)
  • St. Mary's County Oyster Festival, California, Md. (Oct. 17-18)
  • Wellfleet Oyster Fest, Cape Cod, Mass. (Oct. 17-18)
  • Florida Seafood Festival, Apalachicola , Fla. (Nov. 6-7)
  • Urbanna Oyster Festival, Urbanna, Va. (Nov. 6-7)
  • Clayoquot Oyster Festival, Tofino, British Columbia (Nov. 19-22)

On Thursday, Republican presidential candidates meet in Cleveland for their first televised debate, while Jon Stewart hosts his final edition of "The Daily Show" on Comedy Central.

• Republican Presidential debate (sponsored by the Ohio Republican Party), at Quicken Loans Arena in Cleveland on Aug. 6 at 9 p.m. ET, airing on the Fox News Channel
• "The Daily Show with Jon Stewart" (Comedy Central)

Friday kicks off the 40th annual Twins Days Festival in Twinsburg, Ohio, featuring everything from a twins talent show to the so-called "Double Take Parade."

• Twins Days Festival (Aug. 7-9) | Event Schedule

And Saturday sees the enshrinement in Canton, Ohio, of the Pro Football Hall of Fame Class of 2015.

• 2015 NFL Hall of Fame class: Bettis, Brown, Haley, Seau elected (CBS Sports)
• Pro Football Hall of Fame | Class of 2015
• Follow @ProFootballHOF on Twitter, Facebook and YouTube
• Watch induction ceremony Aug. 8 at 7 p.m. ET on ESPN and the NFL Network