# Array of hourly dates

**URL:** https://discourse.julialang.org/t/array-of-hourly-dates/68827
**Category:** General Usage
**Tags:** question, dates
**Created:** [September 27, 2021, 6:59pm UTC](https://discourse.julialang.org/t/array-of-hourly-dates/68827 "2021-09-27T18:59:08Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Mariana](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mariana/32/15064_2.png) [@Mariana](https://discourse.julialang.org/u/Mariana)
#### Post date: [September 27, 2021, 6:59pm UTC](https://discourse.julialang.org/t/array-of-hourly-dates/68827/1 "2021-09-27T18:59:08Z")

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Hello!

I’m trying to use the package Dates to create an array of dates, with the granularity of one hour. For example, I’d like to create an array with all the hours from January 10 to January 20. Any ideas on how I can do this?

Thanks in advance!

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<div class="post-metadata">

### Author: ![lmiq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lmiq/32/18314_2.png) [@lmiq](https://discourse.julialang.org/u/lmiq)
#### Post date: [September 27, 2021, 7:12pm UTC](https://discourse.julialang.org/t/array-of-hourly-dates/68827/2 "2021-09-27T19:12:24Z")

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```julia
julia> using Dates

julia> d1 = DateTime("2021-01-10T12:00:00")
2021-01-10T12:00:00

julia> d2 = DateTime("2021-01-20T12:00:00")
2021-01-20T12:00:00

julia> collect(d1:Hour(1):d2)
241-element Vector{DateTime}:
 2021-01-10T12:00:00
 2021-01-10T13:00:00
 2021-01-10T14:00:00
 2021-01-10T15:00:00

```

see: [Dates · The Julia Language](https://docs.julialang.org/en/v1/stdlib/Dates/#Constructors)

and: [Dates · The Julia Language](https://docs.julialang.org/en/v1/stdlib/Dates/#TimeType-Period-Arithmetic)

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<div class="post-metadata">

### Author: ![Mariana](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mariana/32/15064_2.png) [@Mariana](https://discourse.julialang.org/u/Mariana)
#### Post date: [September 27, 2021, 7:19pm UTC](https://discourse.julialang.org/t/array-of-hourly-dates/68827/3 "2021-09-27T19:19:38Z")

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Thank you very much, that is exactly what I needed!