From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: More tzdb fun: POSIXRULES is being deprecated upstream
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Comments: In-reply-to Robert Haas <robertmhaas@gmail.com>
	message dated "Thu, 18 Jun 2020 14:15:41 -0400"
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Date: Thu, 18 Jun 2020 16:28:33 -0400
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Robert Haas <robertmhaas@gmail.com> writes:
> You could consider something along the lines of:

> This form specifies a transition that always happens during the same
> month and on the same day of the week. m identifies the month, from 1
> to 12. n specifies the n'th occurrence of the day number identified by
> d. n is a value between 1 and 4, or 5 meaning the last occurrence of
> that weekday in the month (which could be the fourth or the fifth). d
> is a value between 0 and 6, with 0 indicating Sunday.

Adopted with some minor tweaks.  Thanks for the suggestion!

			regards, tom lane