Adjustment rules of daylight saving time
Use this function to define transition rules to Daylight Saving Time (DST) across world time zones.
World time zones are used to convert dates and times sent to Production Scheduler to the primary time standard "UTC" (Coordinated Universal Time).
UTC (Coordinated Universal Time) is the equivalent of GMT/GT (Greenwich Mean Time/Greenwich Time).
The rules that determine when Daylight Saving Time (DST) starts or ends can change, and for some time zones changes every year. For Production Scheduler to correctly convert between a time zone and UTC you enter and update time zone information using a set procedure, as follows - you must be careful to make changes in the order below:
- Define world time zones in the Time zones function (TIMEZONEINFO).
Once defined, you must set the PSTIMEZONE - Server time zone parameter (EXAPP chapter, MIS group) to the time zone in which your server is located. - Define Daylight Saving Time (DST) transition rules for world time zones in the Change to daylight saving time function (TIMETRANS).
- Define transition rules to Daylight Saving Time (DST) in this function (TIMEADJUST).
Refer to documentation Screen management
The Adjustment rules of daylight saving time function displays existing time zones in a grid, or table.
Presentation
Each line of the table represents a world or regional time zone with an effective Daylight Saving Time (DST) transition date defined.
The time zones are used by the system to convert dates and times sent to Production Scheduler to the primary time standard "UTC" (Coordinated Universal Time).
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Fields presentation
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Use this field to identify a time zone name. This must be the name of a time zone defined in the Daylight saving time field (TADCOD) in the Time zones function.
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Use this field to describe Daylight Saving Time (DST) for this time zone. You might include the time zone name with a reference to summer or fall. For example, "ACWST - Aus C W Std Summer" or "AUS Fall Central West Std Time". |
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Use this field to define the date this transition rule is effective. |
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Type in the number of hours the time will change by on the defined date (Start date field). Prefix the figure with a minus sign ("-") if this time zone transitions to an earlier time. |
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Use this field to define a Daylight Saving Time (DST) transition rule code. This field is mandatory. For example, a DST transition on the 4th Monday of November at 03:00am, would be the code NOV_MON_4_3, whereas a change to DST that occurs on the 4th of March at 02:00am indefinitely would be the code MAR_FXD_4_2.
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This field displays the day of the week the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time start (TTRCODSTR field) transition rule. |
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This field displays the month the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time start (TTRCODSTR field) transition rule. |
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This field displays the time of the day the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time start (TTRCODSTR field) transition rule. |
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This field displays the week of the month the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time start (TTRCODSTR field) transition rule. |
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Use this field to define a Daylight Saving Time (DST) transition rule code. This field is mandatory. For example, a DST transition on the 4th Monday of March at 03:00am, would be the code MAR_MON_4_3, whereas a change to DST that occurs on the 4th of November at 02:00am indefinitely would be the code NOV_FXD_4_2.
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This field displays the day of the week the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time end (TTRCODEND field) transition rule. |
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This field displays the month the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time end (TTRCODEND field) transition rule. |
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This field displays the time of the day the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time end (TTRCODEND field) transition rule. |
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This field displays the week of the month the transition occurs. It is populated automatically by the value defined for the selected Daylight saving time end (TTRCODEND field) transition rule. |
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Action panel
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Click the Save action to create or add a new transition rule to Daylight Saving Time (DST).
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Examples
By its own definition, a time zone standard time or Daylight Saving Time (DST) will change.
The following scenarios demonstrate when DST changes are required and which functions to use.
- The daylight-saving time transition day changes:
- Use the Change to daylight saving time function (TIMETRANS) to add a new transition rule, if required.
- Use the Adjustment rules of daylight saving time function (TIMEADJUST) to add a new adjustment rule.
- A new time zone is created for your location:
- Use the Change to daylight saving time function (TIMETRANS) to add a new transition rule, if required.
- Use the Adjustment rules of daylight saving time function (TIMEADJUST) to add a new adjustment rule.
- Use the Time zones function (TIMEZONEINFO) to add the new time zone.
- Your time zone stops using DST:
- Use the Adjustment rules of daylight saving time function (TIMEADJUST) to add a new adjustment rule.
- Your time zone starts using DST:
- Use the Change to daylight saving time function (TIMETRANS) to add a new transition rule, if required.
- Use the Adjustment rules of daylight saving time function (TIMEADJUST) to add a new adjustment rule.
- Use the Time zones function (TIMEZONEINFO) to reference the new adjustment rule (in the Daylight saving time field (TADCOD)).