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Mathematics Dictionary
Dr. K. G. Shih
Find day of week


  • Q01 | - Find day of week
  • Q02 | - Use the index table
  • Q03 | - Examples
  • Q04 | - References

    • Q01. Find day of week

    Method
    • Find the year month index number from weekday index table
    • Let n1 = year month index number
    • Let n2 = the given day number of the month
    • Let (n1 + n2)/7 and find the remainder
      • If remainder = 0, it is Sunday
      • If remainder = 1, it is Monday
      • If remainder = 2, it is Tuesday
      • If remainder = 3, it is Wednesday
      • If remainder = 4, it is Thursday
      • If remainder = 5, it is Friday
      • If remainder = 6, it is Saturday
    Weekday index table
    • Weekday index table
    • The index table is in 28 years cycle
    • It is good from March 1 of 1900 to Feb 28 of 2001
    • The table is from 1958 to (left side)

    Go to Begin

    Q02. Use the index table

    Question 1
    • The index table is given from 1956 to 2011
    • How to use it for year before 1956 ?
    • How to use it for year beyond 2011 ?
    Question 2
    • The index table is goo from March 1/1900 to Feburay 28/2100
    • How to use it for year befpre March 1/1900 ?
    • How to use it for year beyond feburay 28/2100 ?
    Answers
    Go to Begin

    Q03. Examples

    Questions
    • Find day of week for December 7 of 1941
    • What is leap year ?
    Answers
    Go to Begin

    Q4. References

    References :
    • Computer calendar, Chapter 15 in Computer Mathematics
    • Author : Dr. Shih
    • Publisher
      • National Institute of compilation and translation
      • Taipei, Taiwan

    Go to Begin
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