The Online Time Use Survey (OTUS) was developed by the Office for National Statistics (ONS) to help improve the measurement of unpaid household production and caring activities that are not captured within traditional economic measures, and to better understand time use from a well-being and quality of life perspective. The survey collects information from adults aged 18 years and over who are randomly sampled from the NatCen Panel (see Associated Media), which is representative of the UK population. Data collected between March 2020 and March 2021 covers Great Britain, and data collected from March 2022 onwards covers the UK. Participants were issued with two pre-allocated diary days (one on a weekday and one on a weekend day) and were asked to record their main activities (in 10-minute intervals) and up to five secondary activities (in five-minute intervals) in each 24-hour period within an online diary tool. Respondents were able to select activities from a pre-defined list. They were also asked to rate how much they enjoyed different activities. In addition, respondents were asked to complete a demographic questionnaire which records personal and household characteristics.