01
Schengen and rolling windows
Start here when the real question is what 90 days in any 180-day period means across a moving Schengen lookback.
AtlasDays Learn
Learn
Concept guides for visa rules, residency thresholds, day-counting logic, and travel-history proof. For AtlasDays setup, imports, trackers, privacy, or sync, use the Help Center.
Start here
Choose the rule family before the edge case
These routes mirror the most common reasons people land on Learn. Start with the family that matches the real problem, then narrow to the article that fits the situation.
02
Visitor stays outside Schengen
Use this when you are comparing how short-stay access or visit patterns are assessed in the US, UK, or Japan.
03
Residency and tax presence
Use this when the issue is whether time spent in a country can trigger residence, tax presence, or a continuous-residence problem.
04
Travel history for applications
Use this when you need a clean travel-history record that will survive form review, visa questions, or document requests.
05
Proof and reconstruction
Use this when the exact record is incomplete and you need to rebuild or support it with other evidence.
06
Broader planning and edge questions
Use this when the question is a travel-list judgment call, country-scope problem, or broader nomad-planning comparison.
Browse by topic
Learn articles
The routes above get you close quickly. The sections below keep the full Learn catalog organized by problem type.
Visa limits and rolling windows
How visitor-day limits are usually counted
Start here when the question is how a stay limit works, how a rolling window is counted, or how a visitor regime is assessed in practice.
What Does 90 Days in Any 180-Day Period Mean?
The core Schengen explainer: what the 90-day rule in Europe means, how the rolling window works, and where travelers usually miscount.
US B1/B2 Visa: Understanding the 180-Day Stay Limit
How US visitor stays are assessed, where the 180-day shorthand helps, and where it can mislead.
UK Standard Visitor: How Length of Stay Is Assessed
How UK visitor stay patterns are assessed in practice and what repeated or long stays can signal.
How the Schengen Rolling Window Actually Works
A worked example of the rolling window when you need the day-by-day logic, not just the headline rule.
When Do You Get Schengen Days Back After a 90-Day Stay?
When Schengen days return and why they come back one day at a time after a long stay.
Schengen Countries List for the 90/180 Rule
The Schengen member list relevant to short-stay counting, with EU and non-EU differences kept separate.
UK ETA vs Standard Visitor Visa: What's the Difference?
When an ETA is enough, when a visitor visa may still be required, and why neither guarantees entry.
Japan's 90-Day Rule Explained
How Japan's short-stay limit works for visa-exempt visitors, what the 90 days means in practice, and where the common counting mistakes happen.
Digital Nomad Visa Day Limits: A Country-by-Country Overview
Compare stay-length patterns across popular nomad routes without mixing them up with standard visitor rules.
Overstaying a Visa or Stay Limit: What It Means and Why It Matters
What overstaying actually means, why consequences differ by country and regime, and what people most commonly misunderstand before they cross a line.
Residency and tax presence
When time in-country starts to carry heavier consequences
Start here when the question is whether time spent in a country can trigger residence, tax presence, or a continuous-residence issue.
183-Day Tax Residency Rule: What Travelers Need to Know
What the 183-day rule usually means, where it is oversimplified, and why context still matters.
UK Statutory Residence Test: What Travelers Need to Know
What the UK's tax-residence test is trying to determine, why 183 days is not the whole story, and how automatic tests and ties matter.
UK ILR Absence Limits: What Continuous Residence Is Trying to Show
What the continuous residence requirement for ILR is really assessing, how the absence limits work in practice, and why the record behind them matters.
UK Citizenship Absence Limits: What Naturalisation Residence Rules Are Trying to Show
What the residence and absence requirements for British citizenship naturalisation are measuring, how the qualifying period works, and where the record behind the dates matters most.
US Substantial Presence Test: What Travelers Need to Know
What the U.S. substantial presence test is trying to determine, why the count is weighted, and where exceptions and closer analysis matter.
Travel history and applications
Build a record that can survive review
Start here when you need to organize travel history for an application, interview, audit, or other formal review.
How to Prepare Travel History for a Visa Application
What a usable travel-history record looks like and the gaps that create avoidable scrutiny.
Travel History Template for Visa Applications
A structured format you can copy when you need dates, countries, purpose, and source notes in one place.
How to Export Your Travel History for a Visa Application
When a clean exported record helps and what to verify before you rely on it.
Proof and reconstruction
Recover the chronology when the record is incomplete
Use these explainers when older travel data is scattered and you need to support the timeline with multiple sources.
How to Rebuild Your Travel History From Passport Stamps, Emails, and Photos
A practical reconstruction workflow when your old travel record is scattered across multiple sources.
How to Prove Time Spent in a Country When You Don't Have Perfect Records
How to combine direct proof, supporting evidence, and reasonable reconstruction when exact records are missing.
How to Prove You Were Not in a Country
How absence claims are really supported, why chronology matters more than one document, and what usually weakens the case.
Day counting fundamentals
Understand the counting model before you automate it
Start here when the question is what usually counts as a day, what trips people up, and why manual tracking breaks down over time.
Country counting and travel-list questions
Broader travel-list questions that still depend on definitions
These pages stay live for broader travel-list questions, but they are not the core Learn path for visa and residency users.
Country Counting Rules: Every Major List Compared
UN, ISO, TCC, NomadMania, FIFA, and other country-counting systems compared in one place.
How Many Countries Are There in the World?
Why the answer changes depending on which list is being used and what each list is actually counting.
Does a Layover Count as Visiting a Country?
A practical framing for layovers, transit, and travel-list judgment calls when the answer is not purely technical.
Use Learn with AtlasDays
Read the rule, then keep the record clean
Learn gives the reasoning model. AtlasDays and the Help Center handle the day-to-day workflow of keeping the trip record accurate enough to support that reasoning.
Record Layer
AtlasDays as the record layer
AtlasDays keeps the dated trip record behind these explainers: trip chronology, tracker math, exports, and the long-term history that later questions depend on.
Help Center
Product workflow
The Help Center covers the AtlasDays side: setup order, tracker behavior, imports, exports, privacy, and sync.
Core Guides
Core explainers
If you are starting from zero, these are the highest-value Learn pages to open first.