Two key dates to check on your passport if you're going to Spain, Greece or PortugalBrits are still being caught out by a passport rule when heading to the likes of Spain and Greece for holidays - and it could mean you're turned away from your flightView 2 Images There are two dates to check (Image: clubfoto via Getty Images)When it comes to booking holidays, most people will check whether their passport will actually be valid for the trip before making any concrete plans. ‌However, there's a post-Brexit rule that's been catching Brits out, and it applies to plenty of popular holiday hotspots including Spain, Greece, Portugal, Italy and France. ‌Two key dates to check on your passportView 2 Images New UK passports are only issued with ten years of validity (Image: Anna Barclay/Getty Images)The first date is obvious; the expiry date. ‌If your passport only meets one of those two dates' criteria, it will be deemed invalid by authorities and you'll likely be denied boarding. It's worth noting that at the time of writing, Greece is waiving the EES for Brits during the peak holiday periods.