# Using Base.Dates with format(dt::TimeType, format::AbstractString)

**URL:** <https://discourse.julialang.org/t/using-base-dates-with-format-dt-timetype-format-abstractstring/2676>\
**Category:** New to Julia\
**Created:** [March 15, 2017, 1:00pm UTC](https://discourse.julialang.org/t/using-base-dates-with-format-dt-timetype-format-abstractstring/2676 "2017-03-15T13:00:37Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![strickek](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/strickek/32/14885_2.png) [@strickek](https://discourse.julialang.org/u/strickek)\
**Post date:** [March 15, 2017, 1:00pm UTC](https://discourse.julialang.org/t/using-base-dates-with-format-dt-timetype-format-abstractstring/2676/1 "2017-03-15T13:00:37Z")

</div>

```julia
Base.Dates.format(DateTime(2017,2,28,12,45), "dd.mm.yy HH:MM")
"28.02.17 12:45"

```

works well, but this

```julia
using Base.Dates
format(DateTime(2017,2,28,12,45), "dd.mm.yy HH:MM")
UndefVarError: format not defined

```

works not. What is wrong with my using “using”?

---

<div class="post-metadata">

**Author:** ![mkborregaard](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mkborregaard/32/556_2.png) [@mkborregaard](https://discourse.julialang.org/u/mkborregaard)\
**Post date:** [March 15, 2017, 1:35pm UTC](https://discourse.julialang.org/t/using-base-dates-with-format-dt-timetype-format-abstractstring/2676/2 "2017-03-15T13:35:33Z")

</div>

It’s just that `format` is not exported. See [http://docs.julialang.org/en/stable/manual/modules/](http://docs.julialang.org/en/stable/manual/modules/)