Dates and numbers


Use the format [Month] [Year].

March 2020
December 2019


Use months instead of quarters. If there is analytics evidence to show that users search for “Quarter 1”, use this term but always explain which months are included in the quarter in brackets.

Business investment: January to March 2019 provisional
Gross domestic product, preliminary estimate, UK: Quarter 1 (Jan to Mar) 2019

Date spans

Use [date] to [date]. If you are using months in the same year, only include the year after the final month. If the date span is covering dates within the same month, include the dates and only write out the month once.

2009 to 2010
July to September 2021
14 to 28 February 2022

Non-calendar years

Use the type of year the data cover and include “ending [month] [year]”.

financial year ending March 2021
academic year ending July 2018


Use “aged [age] to [age] years”. For ages under a year, include months or weeks.

aged 6 to 8 weeks
aged 9 to 10 years

Bottom limits for age restrictions should use “aged [age] years and over”, and not a plus sign.

aged 75 years and over

Upper limits for age restrictions should use “aged under [age] years”.

aged under 40 years

Do not include “old” at the end of an age or age-span. For example, you would use “aged 75 years” not “aged 75 years old”. Only use “old” when referring to a group of people in that age group, such as “75-year-olds”.