+#!/usr/bin/env bash
+# Desc: Baltakatei's verbose date command
+# Usage: bkdatev [args]
+# Example: bkdatev --date="2001-09-11T09:02:59-04"
+# Version: 0.0.1
+# Ref/Attrib: [1] "ISO 8601". Wikipedia. https://en.wikipedia.org/wiki/ISO_8601
+# [2] "Changing the Locale in Wine" https://stackoverflow.com/a/16428951
+# [3] "Shanghai vs Beijing" https://bugs.launchpad.net/ubuntu/+source/libgweather/+bug/228554
+# Notes: * Check `ls -R /usr/share/zoneinfo` for time zone names.
+# * Check `cat /usr/share/i18n/SUPPORTED` for supported locales.
+# * For list of valid locales, see: https://manpages.ubuntu.com/manpages/bionic/man3/DateTime::Locale::Catalog.3pm.html
+# * Locations chosen for population, personal signifiance, and spatial coverage.
+
+line_sep() {
+ # Input: var: n_ln
+ local skip_every=4;
+ ((n_ln++));
+ if ! ((n_ln % "$skip_every")); then
+ printf "\n";
+ fi;
+ return 0;
+}; # periodically print separating blank line
+print_dateline() {
+ # Input: var: $id
+ # var: $fs_1
+ # var: $fs_2
+ # var: $fs_3
+ # args: $@
+ # Output: stdout
+ # Depends: printf, date
+ # Ref/Attrib: * Truncate string in printf https://stackoverflow.com/a/46812677
+ local s_1 s_2 s_3 s_4;
+
+ s_1="$id";
+ s_2="$(date "$@" "$fs_1")";
+ s_3="$(date "$@" "$fs_2")";
+ s_4="$(date "$@" "$fs_3")";
+
+ printf "%-10.10s %-25.25s (%-20.20s) (%s)" "$s_1" "$s_2" "$s_3" "$s_4";
+ printf "\n";
+
+ unset fs_1 fs_2 fs_3 fs_4;
+ }; # print line of dates
+main() {
+ n_ln=0; # for line_sep()
+
+ # format strings
+ fs_iso8601="+%Y-%m-%dT%H:%M:%S%:::z"; # typical ISO-8601
+ fs_iso8601_etc="+%G-W%V-%u, %Y-%j"; # alternate ISO-8601 dates
+ fs_locale="+%Z; %A; %c"; # locale-specific date strings
+
+ # vars for print_dateline()
+ fs_1="$fs_iso8601";
+ fs_2="$fs_iso8601_etc";
+ fs_3="$fs_locale";
+
+ # UTC (pop. (2021): 7,837,000,000)
+ (
+ export TZ=UTC;
+ id="UTC";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Hawaii
+ (
+ export TZ=US/Hawaii;
+ export LANG="haw-US.UTF8";
+ id="HAWAII";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Los Angeles, USA
+ (
+ export TZ=America/Los_Angeles;
+ export LANG="en_US.UTF-8";
+ id="LOS ANGELES";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Denver, USA (pop. (2021): 711,463)
+ (
+ export TZ=America/Denver;
+ export LANG="en_US.UTF-8";
+ id="DENVER";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Chicago, USA (pop. (2021): 711,463)
+ (
+ export TZ=America/Chicago;
+ export LANG="en_US.UTF-8";
+ id="CHICAGO";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Mexico City, Mexico (pop. (2018): 21,804,515)
+ (
+ export TZ=America/Mexico_City;
+ export LANG="es_MX.UTF8";
+ id="MEXICO CITY";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Panama City, Panama
+ (
+ export TZ=America/Panama;
+ export LANG="es_PA.UTF8";
+ id="PANAMA CITY";
+ print_dateline "$@";
+ ); line_sep;
+
+ # New York, USA (pop. (2018): 20,140,470)
+ (
+ export TZ=America/New_York;
+ export LANG="en_US.UTF-8";
+ id="NEW YORK";
+ print_dateline "$@";
+ ); line_sep;
+
+ # São Paulo, Brazil
+ (
+ export TZ=America/Sao_Paulo;
+ export LANG="pt_BR.UTF8";
+ id="SAO PAULO";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Buenos Aires
+ (
+ export TZ=America/Argentina/Buenos_Aires;
+ export LANG="es_AR.UTF8";
+ id="BUENOS AIRES";
+ print_dateline "$@";
+ ); line_sep;
+
+ # London, England
+ (
+ export TZ=Europe/London;
+ export LANG="en_GB.UTF-8";
+ id="LONDON";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Kinshasa, Africa
+ (
+ export TZ=Africa/Kinshasa;
+ export LANG="ln_CD.UTF8";
+ id="KINSHASA";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Lagos, Africa
+ (
+ export TZ=Africa/Lagos;
+ export LANG="en_NG.UTF8";
+ id="LAGOS";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Paris, France
+ (
+ export TZ=Europe/Paris;
+ export LANG="fr_FR.UTF8";
+ id="PARIS";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Stockholm, Sweden
+ (
+ export TZ=Europe/Stockholm;
+ export LANG="sv_SE.UTF8";
+ id="STOCKHOLM";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Cairo, Egypt
+ (
+ export TZ=Africa/Cairo;
+ export LANG="ar_EG.UTF8";
+ id="CAIRO";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Athens (pop. (2020): 3,526,887)
+ (
+ export TZ=Europe/Athens;
+ export LANG="el_GR.UTF8";
+ id="ATHENS";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Istanbul (pop. (2020): 13,719,061)
+ (
+ export TZ=Asia/Istanbul;
+ export LANG="tr_TR.UTF8";
+ id="ISTANBUL";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Tehran, Iran
+ (
+ export TZ=Asia/Tehran;
+ export LANG="fa_IR.UTF8";
+ id="TEHRAN";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Moscow, Russia
+ (
+ export TZ=Europe/Moscow;
+ export LANG="ru_RU.UTF-8";
+ id="MOSCOW";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Kyiv, Ukraine (pop. (2021): 2,962,180)
+ (
+ export TZ=Europe/Kyiv;
+ export LANG="uk_UA.UTF-8";
+ id="KYIV";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Delhi, India (pop. (2018): 29,000,000)
+ (
+ export TZ=Asia/Kolkata;
+ export LANG="hi_IN.UTF-8";
+ id="DELHI";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Jakarta, Indonesia (pop. (2018): 33,430,285)
+ (
+ export TZ=Asia/Jakarta;
+ export LANG="id_ID.UTF8";
+ id="JAKARTA";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Singapore, Singapore (pop (2018): 5,792,000)
+ (
+ export TZ=Asia/Singapore;
+ export LANG="en_SG.UTF-8";
+ id="SINGAPORE";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Beijing, China (pop. (2018): 19,618,000)
+ (
+ export TZ=Asia/Shanghai; # [3]
+ export LANG="zh_CN.UTF-8";
+ id="BEIJING";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Tokyo, Japan (pop. (2018): 37,274,000)
+ (
+ export TZ=Asia/Tokyo;
+ export LANG="ja_JP.UTF8";
+ id="TOKYO";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Seoul, South Korea (pop. (2018): 25,514,000)
+ (
+ export TZ=Asia/Seoul;
+ export LANG="ko_KR.UTF8";
+ id="SEOUL";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Sydney, Australia
+ (
+ export TZ=Australia/Sydney;
+ export LANG="en_AU.UTF8";
+ id="SYDNEY";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Guam
+ (
+ export TZ=Pacific/Guam;
+ export LANG="en_GU.UTF8";
+ id="GUAM";
+ print_dateline "$@";
+ ); line_sep;
+
+ # Auckland, New Zealand
+ (
+ export TZ=Pacific/Auckland;
+ export LANG="en_NZ.UTF8";
+ id="AUCKLAND";
+ print_dateline "$@";
+ ); line_sep;
+
+ return 0;
+}; # main program
+
+main "$@";
projects / BK-2020-03.git / commitdiff