May 12, 2026—KB5087541 (OS Build 25398.2330)

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CLSA-2023-1688677210 Update of tzdata

Upgrade to tzdata-2023c code and data are identical to 2023a - Egypt now uses DST again, from April through October. - This year Morocco springs forward April 23, not April 30. - Palestine delays the start of DST this year. - Much of Greenland still uses DST from 2024 on. - America/Yellowknife...

CLSA-2023-1688673886 Update of tzdata

Upgrade to tzdata-2023c code and data are identical to 2023a - Egypt now uses DST again, from April through October. - This year Morocco springs forward April 23, not April 30. - Palestine delays the start of DST this year. - Much of Greenland still uses DST from 2024 on. - America/Yellowknife...