Timezone Knowledge & Reference Guides
Understand how time zones work around the world.
- Central European Time (CET) ExplainedLearn how Central European Time (CET, UTC+1) and Central European Summer Time (CEST, UTC+2) work, which countries use them, and how DST affects pan-European scheduling.
- Working Hours in Zurich: A Timezone GuideZurich uses CET (UTC+1) in winter and CEST (UTC+2) in summer. This guide covers Swiss business hours, banking sector schedules, and scheduling windows between Zurich and cities in the US, UK, and Asia.
- Working Hours in Amsterdam: A Timezone GuideAmsterdam uses CET (UTC+1) in winter and CEST (UTC+2) in summer. This guide covers Dutch business hours, work-life balance norms, and scheduling windows between Amsterdam and cities in the Americas, UK, and Asia.
- Australian Time Zones ExplainedA comprehensive guide to Australian time zones, covering AEST, ACST, and AWST, the unusual 30-minute and 45-minute offsets, which states observe DST, and scheduling tips.
- Working Hours in Seoul: A Timezone GuideSeoul uses Korea Standard Time (KST, UTC+9) year-round with no daylight saving time. This guide covers Korean business hours, hierarchical meeting culture, and scheduling windows with the US, Europe, and Asia.
- Working Hours in Shanghai: A Timezone GuideShanghai uses China Standard Time (CST, UTC+8) year-round with no daylight saving time. This guide covers Chinese business hours, the single national time zone policy, and scheduling windows with Europe and the Americas.
- Japan Standard Time (JST) ExplainedA complete guide to Japan Standard Time (UTC+9): why Japan abandoned daylight saving time after WWII, how JST shapes business culture, and what developers need to know about JST in servers and logs.
- Working Hours in Mexico City: A Timezone GuideMexico City uses Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) in summer. This guide covers Mexican business hours, mealtime culture, and scheduling with North America and Europe.
- Working Hours in São Paulo: A Timezone GuideSão Paulo operates on Brasília Time (BRT, UTC−3) year-round since Brazil abolished daylight saving time in 2019. This guide covers Brazilian business hours and scheduling windows with North America and Europe.
- India Standard Time (IST) ExplainedEverything you need to know about India Standard Time (UTC+5:30): its unusual half-hour offset, why 1.4 billion people share a single time zone, the IST abbreviation conflict, and business scheduling implications.
- Working Hours in Toronto: A Timezone GuideToronto uses Eastern Standard Time (EST, UTC−5) in winter and Eastern Daylight Time (EDT, UTC−4) in summer, the same as New York City. This guide covers Canadian business hours, financial market schedules, and scheduling windows with global cities.
- IST vs GMT: Time Difference and ConversionIndia Standard Time (IST) is 5 hours and 30 minutes ahead of GMT. Learn how to convert between IST and GMT, understand the half-hour offset, and find scheduling windows for India and UK teams.
- GMT vs CET: Time Difference and ConversionGreenwich Mean Time (GMT) is 1 hour behind Central European Time (CET). Learn how to convert between GMT and CET, understand the seasonal gap during European summer, and schedule across the UK and continental Europe.
- The International Date Line ExplainedUnderstand how the International Date Line works, why it exists, and how it affects travel and scheduling across the Pacific.
- How Many Time Zones Are There?The world has 38 or more time zones depending on how you count them. This guide explains why the number is complicated, which countries span the most zones, and how half-hour and quarter-hour offsets add to the total.
- EST vs CET: Time Difference and ConversionEastern Standard Time (EST) is 6 hours behind Central European Time (CET). Learn how to convert between EST and CET, find the best meeting windows for US East Coast and continental Europe, and understand seasonal DST shifts.
- Daylight Saving Time Explained: Who Changes, When, and WhyEverything you need to know about daylight saving time: which countries observe it, when clocks change, and how it affects scheduling.
- Working Hours in Hong Kong: A Timezone GuideHong Kong operates on Hong Kong Time (HKT, UTC+8) year-round with no daylight saving time. This guide covers business hours, financial market schedules, and scheduling windows with Europe and the Americas.
- PST vs IST: Time Difference and ConversionPacific Standard Time (PST) is 13.5 hours behind India Standard Time (IST). Learn how to convert between PST and IST and find the narrow scheduling windows for US West Coast and India teams.
- GMT vs UTC: What's the Difference?Learn the key differences between Greenwich Mean Time (GMT) and Coordinated Universal Time (UTC), and when to use each.