Southern summer changes the margin
Sydney’s summer occurs during Seoul’s winter, and its clock change can alter the difference. A Seoul afternoon may be closer to Sydney’s closing hour than expected. Test the entire duration against both local work windows when arranging a call across the seasons.
Seoul, KR: Asia/Seoul (city ID: seoul).
Sydney, AU: Australia/Sydney (city ID: sydney).
Does the difference change?
The destination-minus-source differences sampled on the 15th of each month in 2027 are +1h, +2h. These are dated examples, not a promise of fixed offsets or a complete historical range. A different reference date may have different rules.
| Source date | Seoul | Sydney |
|---|---|---|
| 2027-01-16 | 10:00 Korean Standard Time | 2027-01-16 · 12:00 Same day · Australian Eastern Daylight Time |
| 2027-07-16 | 10:00 Korean Standard Time | 2027-07-16 · 11:00 Same day · Australian Eastern Standard Time |
Daylight-saving rules depend on the city and date. When a local hour is missing or repeated, the converter rejects it or asks which occurrence you mean. Rules can change politically; reconfirm far-future meetings.