Blog about English
Writing and saying dates in British and American English.
English expresses dates using a combination of day, month, and year, with different conventions across varieties of English.
British English commonly uses day-month-year order, while American English commonly uses month-day-year order.
British English commonly writes dates in day-month-year order.
For example, 15 August 2026 or 15/08/2026.
American English commonly writes dates in month-day-year order.
For example, August 15, 2026 or 08/15/2026.
Numeric dates can be ambiguous internationally because day-month-year and month-day-year conventions differ.
For example, 04/05/2026 can represent 4 May or April 5 depending on the convention.
The ISO-style year-month-day format is useful when an unambiguous international date representation is needed.
For example, 2026-08-15 represents 15 August 2026.
British English commonly writes the day before the month and may omit punctuation between the parts.
For example, 15 August 2026 and 15th August 2026 can both occur, although the form without the ordinal suffix is common in formal writing.
American English commonly places the month before the day in written dates.
For example, August 15, 2026.
British English commonly uses ordinal numbers when dates are spoken with the day followed by the month.
For example, the fifteenth of August and the twenty-first of March.
American English commonly speaks dates with the month followed by the ordinal day.
For example, August fifteenth and March twenty-first.
When the day comes before the month in a spoken British-style date, the day is commonly introduced by the.
For example, the fifth of June and the twenty-third of September.
British-style spoken dates commonly use of between the ordinal day and month.
For example, the fifth of June.
American English commonly uses a comma between the day and year when the full month-name date is written.
For example, August 15, 2026.
British English normally does not require the same comma pattern used in the American month-day-year format.
For example, 15 August 2026 is standard without the American-style comma.
A day of the week can be added before a date and is commonly separated by a comma in prose.
For example, Monday, 15 August 2026.
On is normally used before a specific date or day when describing when an event occurs.
For example, The meeting is on 15 August and We arrived on Monday.
In is used with months and years when referring to a period rather than a specific day.
For example, in August and in 2026.
At is normally used for exact times rather than complete calendar dates.
For example, at 6:00 on 15 August.
Formal documents generally benefit from an unambiguous date format and consistent regional or organizational convention.
For example, 15 August 2026 or 2026-08-15 can avoid ambiguity better than a purely numeric date.
Informal writing commonly uses abbreviated or numeric date formats when the intended convention is clear from context.
For example, 15/08/26 may be acceptable in a context where day-month-year is established.
Month names can be abbreviated in some written contexts, especially in tables, forms, and schedules.
For example, Jan, Feb, Mar, Apr, Sep, Oct, Nov, and Dec.
Days of the week can be abbreviated in calendars, tables, and schedules.
For example, Mon, Tue, Wed, Thu, Fri, Sat, and Sun.
Years can be pronounced using common spoken patterns that differ from simply reading every digit separately.
For example, 2026 is commonly read twenty twenty-six.
Dates can be identified using BC/BCE and AD/CE conventions.
For example, 44 BC, 44 BCE, AD 476, and 476 CE.
Date ranges can be expressed with from ... to, between ... and, a hyphen, or an en dash depending on context.
For example, from 2010 to 2020, between 2010 and 2020, and 2010–2020.
Expressions such as from Monday to Friday and from 1 June to 15 June identify an interval with both endpoints.
The precise interpretation of inclusiveness depends partly on context and the type of interval being described.
Between is commonly followed by and when identifying two endpoints of a date interval.
For example, between 1 June and 15 June.
By before a date expresses a deadline by which an event should happen.
For example, Please submit the form by 15 August.
Since identifies a starting point from which a situation has continued.
For example, I have lived here since 15 August 2020.
Specific calendar dates use ordinal forms when the day is expressed as an ordinal in speech, although written numeric dates use ordinary digits.
For example, on the fifteenth of August, while written English uses 15 August.
Expressions such as this Monday, last Friday, and next August normally do not require an additional preposition.
For example, I will see you next Monday, not I will see you on next Monday.
Every can introduce recurring days or dates without an additional preposition.
For example, every Monday and every 15th of the month.
Digital contexts commonly use standardized numeric date formats, but the format should be chosen consistently for the audience.
For example, 2026-08-15 is unambiguous compared with 08/15/2026, which depends on convention.
International communication should avoid ambiguous purely numeric dates when the intended day and month could be interpreted differently.
Writing 15 August 2026 or 2026-08-15 can reduce ambiguity.
A date can identify a specific year, while a decade refers to a period of ten years.
For example, 1987 is a year, while the 1980s refers to the decade.
Use the correct regional date order, appropriate prepositions, ordinal forms in spoken dates, and unambiguous formats in international contexts.
Common mistakes include confusing 04/05 dates, saying on next Monday, using in before a specific date, omitting the comma in American full dates, and confusing cardinal and ordinal day forms.