Hijri Date Adjustment in Oracle

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Since Hijri calendar is based on the moon complete revolution around the sun, Hijri calendar has different number of days in a year than Gregorian. Therefore some manual deviation adjustment might be needed for the conversion to/from Gregorian. In other words Hijri calendar is Lunar based, corrections need to be made every so often.

Perform the following steps to adjust the Hijri date:

  • 1. Copy the "lxecal.nlt" file into Oracle_home\nls (you can adjust the file as per your need)
  • 2. Shutdown the database (SQL>shutdown immediate)
  • 3. execute the lxgen.exe command from "Oracle_home\bin"
  • 4. Start the database

Notes: * Gregorian date specified in the deviation should correspond to one of 29th, 30th or 31th days of the Hijri calendar.

  • Numbers greater than 10 are used to subtract days, e.g: 11 --> subtract one day, 12 --> subtract two days and etc.
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