Hi Paul, Hope you're well. By way of introduction, this is Can, working as a software developer in BAML. We noticed that Asia/Singapore had its SGT abbreviation dropped in tzdb 2017, and the reason being is that the zone abbreviation doesn't correspond to any real-world usage. But it's actually not entirely true, SGT is very commonly used in Singapore and it's also a standard abbreviation for Singapore time. Please refer to: https://en.wikipedia.org/wiki/List_of_time_zone_abbreviations and https://en.wikipedia.org/wiki/List_of_time_zone_abbreviations Wondering if it's possible to add SGT back to IANA db as I believe this change will cause breaks to other libraries rely on it. (We're using pytz for python development). I am happy to discuss and appreciate any thoughts you may have on it. Thanks, Can ---------------------------------------------------------------------- This message, and any attachments, is for the intended recipient(s) only, may contain information that is privileged, confidential and/or proprietary and subject to important terms and conditions available at http://www.bankofamerica.com/emaildisclaimer. If you are not the intended recipient, please delete this message.