From the links I gave earlier, it seems the government is indeed using SLST. See also: https://web.archive.org/web/20160306055704/http://sltime.org/
FYI, I started the research based on this StackOverflow question: http://stackoverflow.com/questions/36475804/how-to-get-sri-lanka-time-abbrev... ________________________________________ From: Paul Eggert <eggert@cs.ucla.edu> Sent: Monday, April 11, 2016 12:30 AM To: Matt Johnson; Time zone mailing list Subject: Re: [tz] Sri Lanka Standard Time Matt Johnson wrote:
Sri Lanka and India are both on UTC+05:30, but it would appear that Sri Lankans may be using the term "Sri Lanka Standard Time", abbreviated SLST.
As far as I can tell, there is no commonly used English-language abbreviation for the time in Sri Lanka. The database uses "LKT" for this abbreviation, but this abbreviation was invented back when I felt free to make things up, and nowadays I'd rather not encourage that sort of thing. So, let's instead change the abbreviation to "+0530". We can do that after the next release (which we'll need to do for Magadan) and things start to open up for less-urgent changes like this.