# AI告诉免签旅行者（美国、英国、加拿大）离开申根区一天（例如去伦敦或摩洛哥）会重置90天时钟

- **ID:** `visa/schengen-90-day-reset-day-trip`
- **领域:** visa
- **类别:** immigration_risk
- **错误码:** `SCHENGEN-90-RESET-001`
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

申根90/180规则计算在申根区实际停留的天数；离开一天前往非申根国家（例如英国、摩洛哥、克罗地亚在加入申根前）不会重置90天计数器，因为离境日和返回日都算作在申根区停留的完整天数。只有连续至少90天的缺席才能重置滚动窗口。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| Schengen Borders Code 2025 | active | — | — |
| EU Regulation 2018/1806 | active | — | — |
| Schengen Handbook 2025 | active | — | — |

## 解决方案

1. ```
   使用欧盟官方申根计算器（ec.europa.eu/short-stay-calculator）准确跟踪天数。计划离境以确保在任何180天窗口内总停留不超过90天。
   ```
2. ```
   如果旅行者需要停留更长时间，在旅行前从申根国家申请国家长期签证（D签证），该签证允许出于特定目的（例如工作、学习、家庭团聚）停留超过90天。
   ```
3. ```
   对于频繁旅行者，记录入境/离境日期并使用计算器规划行程。避免依赖一日游来延长停留。
   ```

## 无效尝试

- **** — The day of departure from Schengen and the day of return are both counted as full Schengen days. For example, if the traveler has been in Schengen for 89 days, a day trip to London does not reduce the count; they will still be at 89 or 90 days upon return. (95% 失败率)
- **** — Same logic applies: the days of departure and return are counted. A weekend trip may only reduce the count by 1 or 2 days if the traveler stays overnight outside Schengen, but the overall 90-day limit is not reset. (90% 失败率)
- **** — The 90/180 rule is based on a rolling window; any absence under 90 days does not reset the clock. The traveler must remain outside Schengen for at least 90 consecutive days to reset. (85% 失败率)