Why are months (e.g. December) used to notate a runway?

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I'm writing a report on runway quality and I've stumbled onto a weird qualifier in the data. I understand that runway 17/35 indicates which direction the runway is facing based on magnetic heading.




RWY_ID 17/35 17/35 26-Aug 14/32 30-Dec 28-Oct 21-Mar 13/31




What does 21-March mean for example?






runways







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    Where did you come across this data? Context might help. Please Edit your question.
    – Michael Kjörling
    22 hours ago














up vote
9
down vote

favorite












I'm writing a report on runway quality and I've stumbled onto a weird qualifier in the data. I understand that runway 17/35 indicates which direction the runway is facing based on magnetic heading.




RWY_ID 17/35 17/35 26-Aug 14/32 30-Dec 28-Oct 21-Mar 13/31




What does 21-March mean for example?






runways







share|improve this question









New contributor




Ryan Estes is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.















  • 6




    Where did you come across this data? Context might help. Please Edit your question.
    – Michael Kjörling
    22 hours ago












up vote
9
down vote

favorite









up vote
9
down vote

favorite











I'm writing a report on runway quality and I've stumbled onto a weird qualifier in the data. I understand that runway 17/35 indicates which direction the runway is facing based on magnetic heading.




RWY_ID 17/35 17/35 26-Aug 14/32 30-Dec 28-Oct 21-Mar 13/31




What does 21-March mean for example?






runways







share|improve this question









New contributor




Ryan Estes is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I'm writing a report on runway quality and I've stumbled onto a weird qualifier in the data. I understand that runway 17/35 indicates which direction the runway is facing based on magnetic heading.




RWY_ID 17/35 17/35 26-Aug 14/32 30-Dec 28-Oct 21-Mar 13/31




What does 21-March mean for example?






runways




runways






share|improve this question









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Ryan Estes is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Ryan Estes is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 14 mins ago









ymb1

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asked 22 hours ago









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  • 6




    Where did you come across this data? Context might help. Please Edit your question.
    – Michael Kjörling
    22 hours ago












  • 6




    Where did you come across this data? Context might help. Please Edit your question.
    – Michael Kjörling
    22 hours ago







6




6




Where did you come across this data? Context might help. Please Edit your question.
– Michael Kjörling
22 hours ago




Where did you come across this data? Context might help. Please Edit your question.
– Michael Kjörling
22 hours ago










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Very likely, whatever data source you're using has been mangled by Excel (or some other spreadsheet or data processing system that tries to convert everything that might be a date into a date format).



26-Aug is actually runway 26/08, 30-Dec is actually runway 30/12, etc. (See "How are runways numbered?")



Some computer system saw those numbers, assumed that they were dates, and presented them that way. The other runways aren't valid as dates, so it left them alone. It wouldn't be the first time that people used Excel without fully understanding its default date-parsing settings and thereby causing problems for people trying to use their data afterward.






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  • 5




    Brilliant deduction!
    – Michael Hall
    15 hours ago










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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
37
down vote













Very likely, whatever data source you're using has been mangled by Excel (or some other spreadsheet or data processing system that tries to convert everything that might be a date into a date format).



26-Aug is actually runway 26/08, 30-Dec is actually runway 30/12, etc. (See "How are runways numbered?")



Some computer system saw those numbers, assumed that they were dates, and presented them that way. The other runways aren't valid as dates, so it left them alone. It wouldn't be the first time that people used Excel without fully understanding its default date-parsing settings and thereby causing problems for people trying to use their data afterward.






share|improve this answer








New contributor




Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.













  • 5




    Brilliant deduction!
    – Michael Hall
    15 hours ago














up vote
37
down vote













Very likely, whatever data source you're using has been mangled by Excel (or some other spreadsheet or data processing system that tries to convert everything that might be a date into a date format).



26-Aug is actually runway 26/08, 30-Dec is actually runway 30/12, etc. (See "How are runways numbered?")



Some computer system saw those numbers, assumed that they were dates, and presented them that way. The other runways aren't valid as dates, so it left them alone. It wouldn't be the first time that people used Excel without fully understanding its default date-parsing settings and thereby causing problems for people trying to use their data afterward.






share|improve this answer








New contributor




Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.













  • 5




    Brilliant deduction!
    – Michael Hall
    15 hours ago












up vote
37
down vote










up vote
37
down vote









Very likely, whatever data source you're using has been mangled by Excel (or some other spreadsheet or data processing system that tries to convert everything that might be a date into a date format).



26-Aug is actually runway 26/08, 30-Dec is actually runway 30/12, etc. (See "How are runways numbered?")



Some computer system saw those numbers, assumed that they were dates, and presented them that way. The other runways aren't valid as dates, so it left them alone. It wouldn't be the first time that people used Excel without fully understanding its default date-parsing settings and thereby causing problems for people trying to use their data afterward.






share|improve this answer








New contributor




Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









Very likely, whatever data source you're using has been mangled by Excel (or some other spreadsheet or data processing system that tries to convert everything that might be a date into a date format).



26-Aug is actually runway 26/08, 30-Dec is actually runway 30/12, etc. (See "How are runways numbered?")



Some computer system saw those numbers, assumed that they were dates, and presented them that way. The other runways aren't valid as dates, so it left them alone. It wouldn't be the first time that people used Excel without fully understanding its default date-parsing settings and thereby causing problems for people trying to use their data afterward.







share|improve this answer








New contributor




Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this answer



share|improve this answer






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answered 18 hours ago









Peter Cooper Jr.

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Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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Peter Cooper Jr. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







  • 5




    Brilliant deduction!
    – Michael Hall
    15 hours ago












  • 5




    Brilliant deduction!
    – Michael Hall
    15 hours ago







5




5




Brilliant deduction!
– Michael Hall
15 hours ago




Brilliant deduction!
– Michael Hall
15 hours ago










Ryan Estes is a new contributor. Be nice, and check out our Code of Conduct.









 

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