From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, URIBL_ZEN_BLOCKED_OPENDNS autolearn=ham autolearn_force=no version=3.4.4 Received: from minnie.tuhs.org (minnie.tuhs.org [IPv6:2600:3c01:e000:146::1]) by inbox.vuxu.org (Postfix) with ESMTP id 569102146B for ; Tue, 23 Sep 2025 02:35:07 +0200 (CEST) Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 2F49244517; Tue, 23 Sep 2025 10:35:01 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuhs.org; s=dkim; t=1758587702; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-owner:list-unsubscribe:list-subscribe:list-post; bh=mSXZiskzgmVnQ8ZJuXj5psLp470YD+a5v+1BWv6E0qg=; b=Ps4y3AHO48U1w5gBuXVvCaTitajnvC3bZ5VsjNwHA0CtggG75BfjcwdzyND3tHkdIDpv4s E3qDGf9D9CnV6/gKHTMNIveArQ/Y4XhE27baZfIuBS7WP840IBHZn/CMayfH2UgFTxNVBH 56zdjOE+NeW9Z0lcrT9SWetsRVM8s9s= Received: from gal.iecc.com (gal.iecc.com [IPv6:2001:470:1f07:1126:0:43:6f73:7461]) by minnie.tuhs.org (Postfix) with ESMTPS id 1CFE344516 for ; Tue, 23 Sep 2025 10:34:55 +1000 (AEST) Received: (qmail 4592 invoked from network); 23 Sep 2025 00:34:55 -0000 Received: from ary.qy ([IPv6:2001:470:1f07:1126:0:78:696d:6170]) by imap.iecc.com ([IPv6:2001:470:1f07:1126:0:78:696d:6170]) with ESMTPS (TLS1.3 ECDHE-RSA CHACHA20-POLY1305 AEAD) via TCP6; 23 Sep 2025 00:34:54 -0000 Received: by ary.qy (Postfix, from userid 501) id 03671DD56E9A; Mon, 22 Sep 2025 20:34:53 -0400 (EDT) Date: 22 Sep 2025 20:34:53 -0400 Message-Id: <20250923003454.03671DD56E9A@ary.qy> To: tuhs@tuhs.org In-Reply-To: Organization: Taughannock Networks References: X-Headerized: yes Cleverness: minimal Mime-Version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 8bit Message-ID-Hash: VDCVAPCL33HJ2YMTK3YPHR7THH4245D2 X-Message-ID-Hash: VDCVAPCL33HJ2YMTK3YPHR7THH4245D2 X-MailFrom: johnl@iecc.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: douglas.mcilroy@dartmouth.edu X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: History of cal(1)? List-Id: The Unix Heritage Society mailing list Archived-At: <> List-Archive: <> List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: John Levine via TUHS Reply-To: John Levine It appears that Douglas McIlroy via TUHS said: >> [cal(1)] has all the logic to adjust for 16th century >> calendar changes ... (Try "cal 9 1752") >> My impression is that [it is] overimplemented. > >The fact that a 16th century change is illustrated by an 18th century >example suggests that not quite "all the logic" is there. It's good >for Great Britain and its colonies, but not elsewhere. So I'd say it's >underimplemented :) You'll be relieved to know that ncal has addressed that omission: $ ncal -p AL Albania 1912-11-30 IS Iceland 1700-11-16 AT Austria 1583-10-05 IT Italy 1582-10-04 AU Australia 1752-09-02 JP Japan 1918-12-18 BE Belgium 1582-12-14 LT Lithuania 1918-02-01 BG Bulgaria 1916-03-31 LU Luxembourg 1582-12-14 CA Canada 1752-09-02 LV Latvia 1918-02-01 CH Switzerland 1655-02-28 NL Netherlands 1582-12-14 CN China 1911-12-18 NO Norway 1700-02-18 CZ Czech Republic 1584-01-06 PL Poland 1582-10-04 DE Germany 1700-02-18 PT Portugal 1582-10-04 DK Denmark 1700-02-18 RO Romania 1919-03-31 ES Spain 1582-10-04 RU Russia 1918-01-31 FI Finland 1753-02-17 SI Slovenia 1919-03-04 FR France 1582-12-09 SE Sweden 1753-02-17 GB United Kingdom 1752-09-02 TR Turkey 1926-12-18 GR Greece 1924-03-09 *US United States 1752-09-02 HU Hungary 1587-10-21 YU Yugoslavia 1919-03-04 R's, John PS: my point was not that it's a lot of code, but that is's a distinctive hack so one might look at earlier calendar programs to see whether they also did it to try and trace the chain of influence.