1. Maryland Constitution Comes into Effect
On August 29, 1864, the Maryland Constitution came into effect, establishing the state's government structure and outlining the powers and rights of its citizens. This constitution is still in use today, although it has been amended many times over the years.

2. Frederick Douglass's Speech in Baltimore
On August 29, 1883, abolitionist and civil rights leader Frederick Douglass gave a speech in Baltimore in which he urged African Americans to work together to achieve political power and social equality. The speech was given at the Lyric Theater and drew a large crowd.

3. First Governor's Bay Swim
The first Governor's Bay Swim took place on August 29, 1981. The race involves swimming across the Chesapeake Bay from Sandy Point State Park to Kent Island, a distance of approximately 4.4 miles. The race has since become an annual event and attracts hundreds of participants.

4. University of Maryland Joins the Big Ten
On August 29, 2014, the University of Maryland officially joined the Big Ten athletic conference. The move was controversial, as it resulted in the school leaving its longtime home in the Atlantic Coast Conference. However, the move has been seen as a positive development overall for the university's athletic program.

5. Ellicott City Flood
On August 29, 2016, Ellicott City, Maryland experienced a devastating flood that caused significant damage to businesses and homes in the area. The flood was caused by a heavy rainstorm that dropped six inches of rain in just two hours. The town has since been working to rebuild and improve its flood defenses.