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I appreciate your question, but the context provided only identifies "1867" as a year without any specific information about what it refers to or why it might matter. Without additional context about which historical event, work, person, or topic you're interested in learning about from that year, I cannot accurately write the overview you've requested.
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1867 (MDCCCLXVII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1867th year of the Common Era (CE) and Anno Domini (AD) designations, the 867th year of the 2nd millennium, the 67th year of the 19th century, and the 8th year of the 1860s decade. As of the start of 1867, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.
There were only 354 days this year in the newly purchased territory of Alaska. When the territory transferred from the Russian Empire to the United States, the calendric transition from the Julian to the Gregorian Calendar was made with only 11 days instead of 12 during the 19th century. This change was made due to the territorial and geopolitical shift from the Asian to the American side of the International Date Line. Friday, 6 October 1867 (Julian Calendar) was followed by Friday again on 18 October 1867 (instead of Saturday, 19 October 1867 in the Gregorian Calendar).