护照有效期检查
核对护照到期日与出行日，判断是否满足 6 个月有效期规则。
以计划出行日为基准计算剩余有效期。
中文介绍
很多国家入境时要求护照有效期 ≥ 6 个月（部分按入境日、部分按离境日算）。出行前核对一下，避免到了机场才发现护照快过期。
输入护照到期日与计划出行日，即可看到剩余有效月数/天数与是否满足规则。
提醒：各国规则不同，少数国家只要求 3 个月或按离境日算，具体以目的地使领馆为准；本工具按最常见的「入境日满 6 个月」口径。
常见问题
6个月是硬性规定吗？
多数国家是硬性要求，不满足会被拒绝入境。少数按离境日算或只要求 3 个月，需查目的地规定。
按入境日还是离境日？
多数按入境日；部分按离境日。本工具按入境日口径，最保险。
护照快过期怎么办？
提前申请换发新护照，多数国家可加急。别等临近出行再办，避免耽误行程。
English
Many countries require your passport to be valid for at least 6 months at entry (some count from entry, some from exit). Check before you fly so you're not turned away at the airport.
Enter your passport expiry and planned travel date to see months/days left and whether the rule is met.
Note: rules vary — a few countries need only 3 months or count from departure. This tool uses the common "6 months from entry" standard; always confirm with the destination embassy.
FAQ
Is 6 months a hard rule?
For most countries yes, and failing it means denied entry. A few count from departure or need only 3 months — check the destination.
Entry or exit date?
Most count from entry; some from exit. This tool uses the entry-date standard, which is the safest assumption.
What if my passport expires soon?
Apply for renewal early; many countries offer expedited service. Don't wait until close to departure.