lutz

0.3.2

Look Up Time Zones of Point Coordinates

10packages depend

30.7Kdownloads / year

96.4%test coverage

13/13checks pass

Overview

About

Maintained by Andy TeucherFirst published 2018-02-075 releasesCRAN page ↗GitHub ↗

Input latitude and longitude values or an 'sf/sfc' POINT object and get back the time zone in which they exist. Two methods are implemented. One is very fast and uses 'Rcpp' in conjunction with data from the 'Javascript' library (https://github.com/darkskyapp/tz-lookup-oss/). This method also works outside of countries' borders and in international waters, however speed comes at the cost of accuracy - near time zone borders away from populated centres there is a chance that it will return the incorrect time zone. The other method is slower but more accurate - it uses the 'sf' package to intersect points with a detailed map of time zones from here: https://github.com/evansiroky/timezone-boundary-builder/. The package also contains several utility functions for helping to understand and visualize time zones, such as listing of world time zones, including information about daylight savings times and their offsets from UTC. You can also plot a time zone to visualize the UTC offset over a year and when daylight savings times are in effect.

Install

R (CRAN)pak (dev)Ubuntu (r2u)openSUSE (OBS)

install.packages("lutz", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("ateucher/lutz")

Development version from ateucher/lutz. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-lutz

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-lutz

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 3.0 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 1.80

96.4%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-04-25
12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-04-22
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-18
10 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 607 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 100%
References docs: 0%

Downloads

30.7K

CRAN downloads in the past year

Rank #3,029 · ~84/day · ~2.6K/mo

Releases R versions

Daily download trend is not available in this view yet.

1.8K30 days

4.8K90 days

30.7K1 year

Compare downloads with other packages →

Also on856 r2u41 autocran206 conda_forge81 c2d4u

Repository

GitHub ↗ ateucher/lutz

61Stars

5Forks

4Open issues

0Open PRs

3Releases

182Commits

4Contributors

182 commits · Last activity 2023-10-17 · 0% stars, 30d

Stars over time

2025-05-27 · 602026-07-07 · 61

Repository practices

Upstream repositoryBeta

9 development-tooling and community-health practices detected across 6 families in the upstream repository

Checks run against github.com/ateucher/lutz on 2026-07-19.

Continuous integration (3)

GitHub ActionsTravis CIAppVeyor

Reproducibility and dev environment (1)

data-raw/

CRAN release process (2)

cran-comments.mdrevdep/

Docs source (1)

README.Rmd

Show all practices

Lint, format, editor (1)

RStudio project

Coverage (1)

Codecov

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

8 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.2

Imports (3)

statsRcpp lubridate

LinkingTo (1)

Rcpp

Suggests (6)

testthat sf spdatasetscovr ggplot2

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

10direct

1indirect

ARUtools CDSE ascotraceR bioRad finbif stationaRy weathR SunCalcMeeus photobiology spectator

Code & Tests

People & History

People (2)

Maintainer (1)

Andy Teucher

Author, Maintainer

Authors (1)

Andy Teucher

Author, Maintainer

Contributors (1)

Bob Rudis

Contributor · added in 0.3.0

Package Timeline

5 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.3.2Latest
2023-10-17 · current release · diff ↗
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
0.3.1
2019-07-20 · diff ↗
0.3.0
2019-07-14 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.2.0
2018-06-24 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.1.0
2018-02-07
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2018-02-07
Total releases: 5 / 8 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.2
Download size: 4.2 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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