January
05 – death of Grand Duke Karl Alexander (1901)
07 – death of Empress Augusta of Germany, dtr of Grand Duke Karl Friedrich (1890)
17 – death of Grand Duchess Caroline, first wife of Grand Duke Wilhelm Ernst (1905)
18 – death of Princess Marie of Prussia, daughter of Grand Duke Karl Friedrich (1877)
20 – death of Karoline Luise, Hereditary Grand Duchess of Mecklenburg-Schwerin, dtr of Grand Duke Karl August (1816)
20 – birth of Princess Marie, daughter of Grand Duke Karl Alexander (1849)
21 – marriage(2) of Grand Duke Wilhelm Ernst and Princess Feodora of Saxe-Meiningen (1910)
30 – birth of Luise of Hesse-Darmstadt, wife of Grand Duke Karl August (1757)

February
02 – birth of Grand Duke Karl Friedrich (1783)
03 – birth of Princess Luise, daughter of Grand Duke Karl August (1779)
03 – birth of Princess Marie, daughter of Grand Duke Karl Friedrich (1808)
06 – marriage of Princess Marie, dtr of Grand Duke Karl Alexander, to Prince Heinrich VII Reuss of Köstritz (1876)
14 – death of Grand Duchess Luise, wife of Grand Duke Karl August (1830)
16 – birth of Grand Duchess Maria Pavlovna of Russia, wife of Grand Duke Karl Friedrich (1786)
28 – birth of Princess Elisabeth, daughter of Grand Duke Karl Alexander (1854)

March
03 – birth of Prince Bernhard, son of Grand Duke Wilhelm Ernst (1917)
11 – death of Prince Georg, son of Grand Duke Wilhelm Ernst (2011)
12 – death of Grand Duchess Feodora, second wife of Grand Duke Wilhelm Ernst (1972)
20 – birth of Princess Sophie, daughter of Grand Duke Wilhelm Ernst (1911)
23 – death of Grand Duchess Sophie, wife of Grand Duke Karl Friedrich (1897)
23 – death of Prince Bernhard, son of Grand Duke Wilhelm Ernst (1986)
24 – death of Princess Luise, daughter of Grand Duke Karl August (1784)
29 – birth of Princess Anna, daughter of Grand Duke Karl Alexander (1851)

April
08 – birth of Princess Sophie of the Netherlands, wife of Grand Duke Karl Friedrich (1824)
10 – death of Prince Karl, son of Grand Duke Karl Friedrich (1806)
18 – birth of Prince Bernhard, son of Prince Karl August (1878)
21 – establishment of the Grand Duchy of Saxe-Weimar-Eisenach (1815)
24 – death of Grand Duke Wilhelm Ernst (1923)
26 – death of Princess Anna, daughter of Grand Duke Karl Alexander (1859)
30 – marriage(1) of Grand Duke Wilhelm Ernst and Princess Caroline Reuss of Greiz (1903)

May
06 – death of Princess Marie Reuss of Köstritz, daughter of Grand Duke Karl Alexander (1922)
29 – birth of Princess Feodora of Saxe-Meiningen, second wife of Grand Duke Wilhelm Ernst (1890)
30 – birth of Prince Karl Bernhard, son of Grand Duke Karl August (1792)

June
10 – birth of Grand Duke Wilhelm Ernst (1876)
11 – marriage of Princess Marie, dtr of Grand Duke Karl Friedrich, to Prince Karl of Prussia (1827)
11 – marriage of Princess Augusta, dtr of Grand Duke Karl Friedrich, to King Wilhelm I of Prussia (1829)
14 – death of Grand Duke Karl August (1828)
23 – death of Grand Duchess Maria, wife of Grand Duke Karl Friedrich (1859)
24 – birth of Grand Duke Karl Alexander (1818)

July
01 – marriage of Princess Karoline Luise, dtr of Grand Duke Karl August, to Friedrich Ludwig, Hereditary Grand Duke of Mecklenburg-Schwerin (1810)
08 – death of Grand Duke Karl Friedrich (1853)
10 – death of Elisabeth of Mecklenburg-Schwerin, daughter of Grand Duke Karl August (1908)
13 – birth of Caroline Reuss of Greiz, first wife of Grand Duke Wilhelm Ernst (1884)
18 – birth of Princess Karoline Luise, daughter of Grand Duke Karl August (1786)
28 – birth of Prince Karl August, son of Grand Duke Wilhelm Ernst (1912)
31 – birth of Prince Karl August, son of Grand Duke Karl Alexander (1844)
31 – death of Prince Karl Bernhard, son of Grand Duke Karl August (1862)

August
03 – marriage of Grand Duke Karl Friedrich and Grand Duchess Maria Pavlovna of Russia (1804)
26 – marriage of Prince Karl August, son of Grand Duke Karl Alexander, to Pauline of Saxe-Weimar-Eisenach (1873)

September
03 – birth of Grand Duke Karl August (1757)
25 – birth of Prince Karl, son of Grand Duke Karl Friedrich (1805)
30 – birth of Princess Augusta, daughter of Grand Duke Karl Friedrich (1811)

October
01 – death of Prince Bernhard, son of Prince Karl August (1900)
03 – marriage of Grand Duke Karl August and Princess Luise of Hesse-Darmstadt (1775)
05 – marriage of Prince Karl August, son of Grand Duke Wilhelm Ernst, to Elisabeth of Wangenheim-Winterstein (1944)
08 – marriage of Grand Duke Karl Alexander and Princess Sophie of the Netherlands (1842)
14 – death of Prince Karl August, son of Grand Duke Wilhelm Ernst (1988)

November
06 – marriage of Princess Elisabeth, dtr of Grand Duke Karl Alexander, to Duke Johann of Mecklenburg-Schwerin (1886)
09 – abdication of Grand Duke Wilhelm Ernst, end of the monarchy (1918)
20 – death of Prince Karl August, son of Grand Duke Karl Alexander (1894)
21 – death of Princess Sophie, daughter of Grand Duke Wilhelm Ernst (1988)
24 – birth of Prince Georg, son of Grand Duke Wilhelm Ernst (1921)

December