How did “September” shift from 7th month to 9th month of a year? (and same for October, November, December)

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If I understand correctly, the words September, October, November and December all come from French counterpart Septembre, Octobre, Novembre and Decembre, and ultimately from Latin septem, octo, novem and decem with a suffix -bre. Therefore I suppose their original meaning were from "7th month of a year" to "10th month of a year".



Apparently those words stand for "9th month" to "12th month" nowadays, so why and how did this happen?










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    If I understand correctly, the words September, October, November and December all come from French counterpart Septembre, Octobre, Novembre and Decembre, and ultimately from Latin septem, octo, novem and decem with a suffix -bre. Therefore I suppose their original meaning were from "7th month of a year" to "10th month of a year".



    Apparently those words stand for "9th month" to "12th month" nowadays, so why and how did this happen?










    share|improve this question























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      If I understand correctly, the words September, October, November and December all come from French counterpart Septembre, Octobre, Novembre and Decembre, and ultimately from Latin septem, octo, novem and decem with a suffix -bre. Therefore I suppose their original meaning were from "7th month of a year" to "10th month of a year".



      Apparently those words stand for "9th month" to "12th month" nowadays, so why and how did this happen?










      share|improve this question













      If I understand correctly, the words September, October, November and December all come from French counterpart Septembre, Octobre, Novembre and Decembre, and ultimately from Latin septem, octo, novem and decem with a suffix -bre. Therefore I suppose their original meaning were from "7th month of a year" to "10th month of a year".



      Apparently those words stand for "9th month" to "12th month" nowadays, so why and how did this happen?







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      iBug

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          According to the OED, the switch from month number 7 to 9 was made well before English was even a language:




          The ancient Roman calendar (dating from around the mid 8th cent. b.c.) had ten months; c713 b.c. January and February were added to the end. In 153 b.c. the beginning of the year was moved to 1 January, when the Roman consuls were elected. This new ordering of the months remained when the Julian calendar was introduced in 45 b.c. and in the Gregorian calendar widely used today.




          We only use the word "September" in English because it was brought in from Latin.






          share|improve this answer




















          • So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
            – Sora Tamashii
            41 mins ago










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          1 Answer
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          1 Answer
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          active

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          up vote
          2
          down vote



          accepted










          According to the OED, the switch from month number 7 to 9 was made well before English was even a language:




          The ancient Roman calendar (dating from around the mid 8th cent. b.c.) had ten months; c713 b.c. January and February were added to the end. In 153 b.c. the beginning of the year was moved to 1 January, when the Roman consuls were elected. This new ordering of the months remained when the Julian calendar was introduced in 45 b.c. and in the Gregorian calendar widely used today.




          We only use the word "September" in English because it was brought in from Latin.






          share|improve this answer




















          • So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
            – Sora Tamashii
            41 mins ago














          up vote
          2
          down vote



          accepted










          According to the OED, the switch from month number 7 to 9 was made well before English was even a language:




          The ancient Roman calendar (dating from around the mid 8th cent. b.c.) had ten months; c713 b.c. January and February were added to the end. In 153 b.c. the beginning of the year was moved to 1 January, when the Roman consuls were elected. This new ordering of the months remained when the Julian calendar was introduced in 45 b.c. and in the Gregorian calendar widely used today.




          We only use the word "September" in English because it was brought in from Latin.






          share|improve this answer




















          • So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
            – Sora Tamashii
            41 mins ago












          up vote
          2
          down vote



          accepted







          up vote
          2
          down vote



          accepted






          According to the OED, the switch from month number 7 to 9 was made well before English was even a language:




          The ancient Roman calendar (dating from around the mid 8th cent. b.c.) had ten months; c713 b.c. January and February were added to the end. In 153 b.c. the beginning of the year was moved to 1 January, when the Roman consuls were elected. This new ordering of the months remained when the Julian calendar was introduced in 45 b.c. and in the Gregorian calendar widely used today.




          We only use the word "September" in English because it was brought in from Latin.






          share|improve this answer












          According to the OED, the switch from month number 7 to 9 was made well before English was even a language:




          The ancient Roman calendar (dating from around the mid 8th cent. b.c.) had ten months; c713 b.c. January and February were added to the end. In 153 b.c. the beginning of the year was moved to 1 January, when the Roman consuls were elected. This new ordering of the months remained when the Julian calendar was introduced in 45 b.c. and in the Gregorian calendar widely used today.




          We only use the word "September" in English because it was brought in from Latin.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 1 hour ago









          Laurel

          26.7k64996




          26.7k64996











          • So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
            – Sora Tamashii
            41 mins ago
















          • So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
            – Sora Tamashii
            41 mins ago















          So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
          – Sora Tamashii
          41 mins ago




          So, basically, the OG America happened, before America ever existed. (I'm looking at you Imperial System!)
          – Sora Tamashii
          41 mins ago

















           

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