f0rest8
I know I’m missing something here, but I’ve bounced around from Calendar and Timex trying to get a :strftime format with the offset computed in the formatted hours to no avail.
Is there a way to format a DateTime string using :strftime but computing the offset in the hours representation?
Currently, I convert a NaiveDateTime with Timex so that I can see what Calendar’s calculating as the offset (which shows that everything is correct time-wise — just not my formatting ability).
dt = Timex.to_datetime(naive_date_string, "America/New_York")
datetime = Calendar.strftime(dt, "%A %b. %d, %Y @ %I:%M %z")
"Friday Aug. 20, 2021 @ 06:14 -0400"
It seems like whenever I come back to formatting using :strftime I arrive back in the future because the offset is not able to be computed in the formatted hours.
When I use the %z to see what the offset is, it’s correct and leaves me wishing I could just use something like %I only with the offset computed from the inputted datetime.
Where Next?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Error tracking, logs, APM, uptime and cron monitoring in one dev-friendly platform. Find and fix problems before your users notice.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #blog-post
- #elixirconf-us
- #elixir-ls
- #ai
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #hex
- #security
- #metaprogramming
Our Sponsors
Build Elixir applications with speed and confidence.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Bringing learning, work and compliance together since 1987.
Producing high quality Elixir screencasts since 2017.
**Building the future of software with AI, trust, and human connection.**
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 7- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
vfsoraki
%zalready gives you the offset in hours and minutes.I’m not sure I understood your problem, care to clarify more? What do you mean by “hours representation”?
vfsoraki
Also, if you just need the offset, you can use
DateTimestruct directly, using fieldsutc_offsetandstd_offsetwhich are in seconds, but you can convert them to hours if you wish.f0rest8
7:00instead of10:00if the offset were say-0300.From what I can tell is that when using
:strftimeyou always get the hours and offset separately. For example, you’d get10:00 -0300(and you can get those separately of course), but you can’t get7:00with the offset having been applied to the hours for you.Is that correct?
vfsoraki
So you’re basically trying to convert your datetimes to UTC?
I think
shift_zone/3might be useful to you, or if you use Timex I thinkconvert/2might be useful.I think you want to convert your datetimes to “Etc/UTC” or similar.
f0rest8
Thank you
I think I’ve been going in circles on this one.
vfsoraki
You’re welcome.
BTW, I think I pasted the second link wrong, here it is: Timex.Timezone — timex v3.7.13
acrolink
For anyone looking for the straightforward answer to this very basic need (not documented anywhere), can be done like this: