hugo/docs/content/en/functions/AddDate.md

title	description	categories	keywords	menu	function	relatedFunctions
.AddDate	Returns the time corresponding to adding the given number of years, months, and days to the given time.Time value.	functions		docs parent functions	aliases returnType signatures time.Time .AddDate YEARS MONTHS DAYS

{{ $d := "2022-01-01" | time.AsTime }}

{{ $d.AddDate 0 0 1 | time.Format "2006-01-02" }} → 2022-01-02
{{ $d.AddDate 0 1 1 | time.Format "2006-01-02" }} → 2022-02-02
{{ $d.AddDate 1 1 1 | time.Format "2006-01-02" }} → 2023-02-02

{{ $d.AddDate -1 -1 -1 | time.Format "2006-01-02" }} → 2020-11-30

{{% note %}} When adding months or years, Hugo normalizes the final time.Time value if the resulting day does not exist. For example, adding one month to 31 January produces 2 March or 3 March, depending on the year.

See this explanation from the Go team. {{% /note %}}

{{ $d := "2023-01-31" | time.AsTime }}
{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} → 2023-03-03

{{ $d := "2024-01-31" | time.AsTime }}
{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} → 2024-03-02

{{ $d := "2024-02-29" | time.AsTime }}
{{ $d.AddDate 1 0 0 | time.Format "2006-01-02" }} → 2025-03-01