London to Rosario de Lerma time converter

Rosario de Lerma is 4 hours behind London. When it is 9:00 AM in London, it is 5:00 AM in Rosario de Lerma.

London BST

Wednesday, October 21, 2026

Rosario de Lerma ART

Wednesday, October 21, 2026

London
United Kingdom
Wed, Oct 21
BSTUTC+1
Rosario de Lerma
Argentina
Wed, Oct 21
ARTUTC-3-4h
Finding your time zone…
Shared working hours (9:00–18:00)

London to Rosario de Lerma conversion table

Every hour of today in London and the matching time in Rosario de Lerma. Light rows are typical working hours (9:00–18:00).

LondonRosario de Lerma
12:00 AM8:00 PM−1 day
1:00 AM9:00 PM−1 day
2:00 AM10:00 PM−1 day
3:00 AM11:00 PM−1 day
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

Best time to call or meet

Both sides are at work from 1:00 PM – 6:00 PM in London (9:00 AM – 2:00 PM in Rosario de Lerma).

Daylight saving time and the difference

The difference changes during the year because London and Rosario de Lerma switch clocks on different dates:

  • Oct 21, 2026 – Oct 25, 2026: -4h
  • Oct 25, 2026 – Mar 28, 2027: -3h
  • Mar 28, 2027 – Oct 21, 2027: -4h

Distance

London and Rosario de Lerma are 10,622 km (6,600 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between London and Rosario de Lerma?

Rosario de Lerma is 4 hours behind London.

What time is it in Rosario de Lerma when it is 9 AM in London?

When it is 9:00 AM in London, it is 5:00 AM in Rosario de Lerma.

When is the best time to call Rosario de Lerma from London?

Both sides are at work from 1:00 PM – 6:00 PM in London (9:00 AM – 2:00 PM in Rosario de Lerma).

Does the time difference between London and Rosario de Lerma change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.