WorldTimePortalFrom Norway to a worldwide calendar
WorldTimePortal is a project from Pivot Studio in Oslo, Norway. The founder has operated ukekalenderen.no, a calendar website for the Norwegian market, for several years. WorldTimePortal brings that experience to an international audience.
With broad experience in programming and AI, the founder takes a meticulous approach to how date and time information is calculated and presented. The aim is straightforward: make everyday planning easier, while making the underlying information clear enough to inspect and cite.
What we publish
Our calendars with week numbers show ISO weeks, public holidays and important observances. You can also compare local times with the world clock, plan international meetings, calculate dates, create countdowns and explore sunrise, sunset and eclipse information.
Our sources and methods
Different kinds of information require different methods. We use shared data and calculation rules so that the calendar, date tables and downloadable data stay consistent.
- Week numbers: our calendars use the ISO 8601 week-date convention. Weeks run Monday to Sunday, and week 1 is the week containing January 4. Dates at the start or end of a calendar year can belong to a different ISO week-year.
- Holidays and observances: fixed and rule-based dates are calculated in our calendar data. Government publications are the reference for public holiday rules, including US federal holidays and UK bank holidays. Regional differences and provisional dates are identified where relevant.
- Time zones: our clocks and time conversions use IANA time zone identifiers and the IANA Time Zone Database provided by the browser or runtime. Daylight saving rules apply through that database; new government changes depend on the underlying software receiving updated time zone data.
- Sunrise and sunset: these are calculated using NOAA-style solar equations. The NOAA calculation notes explain why atmospheric conditions and the local horizon can affect observed times.
- Eclipses: our catalog references NASA eclipse catalogs. The eclipse page distinguishes global event information from local visibility; a global eclipse time is not a local viewing prediction.
Reviews, corrections and limitations
The founder is responsible for WorldTimePortal’s editorial oversight. Our review schedule includes daily, weekly and monthly checks of the site’s data. Automated tests also check selected known dates, week boundaries and time calculations; they support review rather than replacing it.
We aim for a high standard of accuracy, but cannot promise that every detail is error-free. Governments can change holidays and daylight saving rules, some religious dates depend on moon sightings, and school holidays vary by region or institution. For travel, legal deadlines or other critical decisions, confirm the relevant date with the responsible authority.
Help us correct an error
If something looks wrong, email contact@worldtimeportal.com with the page address, the date or location concerned, and an official source if available. Reports help us investigate the underlying information and correct related calendar and data outputs.
Information that can be inspected and cited
Calendar information is published as readable HTML, with structured data and public Markdown and JSON versions. People, search engines and AI assistants can refer to the same dates rather than relying only on an interactive display. Our terms of use explain how to cite the data.
How the site is funded
Advertising is planned to help finance WorldTimePortal. As advertising is introduced, visitors may see ads on the site. You can read about advertising cookies and your choices in our Privacy Policy.
Publisher and contact details
- Business name
- Pivot Studio
- Legal business name
- Andreas Aalby
- Norwegian organisation number
- 920 942 482
- Postal address
- Gaustadveien 17A
0372 Oslo
Norway
You can reach us by email or by letter at the address above. For correction reports and suggestions, see our contact page.