5pm in Buenos Aires is 5am in Tokyo

When it’s 9am in Buenos Aires, it’s 9pm in Tokyo. Tokyo sits 12 hours ahead of Buenos Aires every day of the year. Neither city adjusts for daylight saving time, so the gap never shifts and there are no seasonal surprises to plan around. That consistency makes it straightforward to set a standing recurring meeting and leave it alone. With 12 hours separating these cities, standard business hours do not overlap at all. The closest thing to a shared live window is an early call from Buenos Aires around 7am or 8am, which lands in the late afternoon or evening in Tokyo. Most teams on this corridor rely on async handoffs for routine updates and reserve live calls for decisions that genuinely cannot wait for a response the following morning. Remote and distributed teams working across Buenos Aires and Tokyo usually anchor their daily standup to the city with the larger headcount, then ask the smaller group to flex by an hour or two. BPO and customer support operations on this corridor often run split shifts, with one team handling early hours so the handoff lands cleanly before the other side ends its day. Detailed async notes at each shift boundary reduce the cost of the gap considerably. Teams that treat the offset as a feature rather than a friction point often find they can cover more hours of customer availability than a single-timezone operation ever could.