Passport Validity

The 'six-month rule', almost every country requires your passport to be valid for 6 months beyond your planned departure date.

Almost every country worldwide requires your passport to have at least 6 months of validity remaining beyond your planned date of departure from that country.

Why it exists: countries don't want stranded travelers whose passports expire while they're inside the country, complicating exit and rebookings.

All of South-East Asia (Thailand, Indonesia, Malaysia, Vietnam, Singapore)
All of the Middle East (UAE, Qatar, Saudi Arabia, Oman)
USA, Australia, New Zealand
China, Japan, South Korea, Taiwan

Schengen Area, passport must be valid for 3 months beyond intended departure from Schengen
UK, must be valid for the duration of stay only
Canada, duration of stay only

The Indian-specific trap: Indian passports take 4–6 weeks to renew under normal Tatkal-free processing, and 1–3 weeks under Tatkal (additional ₹2,000 fee). If your trip is in 8 weeks and your passport expires in 7 months, you have <30 days of buffer, renew now via Tatkal.

passportindia.gov.in, official PSK booking; cheapest
Avoid third-party "expedited" services on Google ads, they're just resellers of the same Tatkal slots