The incompatibilities with macOS 10.15 Catalina have been solved.
The offset from UTC of the Antarctic stations Casey and Concordia has been updated. Both stations moved from UTC+8 to UTC+11.
Daylight-saving time information for Fiji and Norfolk Island has been updated. Fiji will observe daylight-saving time from November 10, 2019 to January 12, 2020. Norfolk Island introduced daylight-saving time following the Australian rule.
Some minor bugs have been fixed.
Cities, Time Zones, DST Rules 4.16.2.1 - April 2020
The offset from UTC of the Antarctic stations Casey and Concordia has been updated. With winter approaching in the southern hemisphere, both stations moved from UTC+11 to UTC+8.
Daylight-saving time information for the Canadian territory of Yukon and for Iran, Morocco, and Western Sahara has been updated. Yukon abolished the switch to standard time and will observe daylight-saving time all year round. This year, Iran will observe DST from March 21 to September 21. Morocco and Western Sahara will switch from Western Europe Summer Time (UTC+1) to Western Europe Time (UTC) during Ramadan, from April 19 to May 31, 2020.