# How We Calculate Time on Task, the Business Hours Between Two Dates
**URL:** https://discourse.getdbt.com/t/how-we-calculate-time-on-task-the-business-hours-between-two-dates/6680
**Category:** In-Depth Discussions
**Tags:** devblog
**Created:** [February 8, 2023, 5:06pm UTC](https://discourse.getdbt.com/t/how-we-calculate-time-on-task-the-business-hours-between-two-dates/6680 "2023-02-08T17:06:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@system](https://discourse.getdbt.com/u/system)
#### Post date: [February 8, 2023, 5:06pm UTC](https://discourse.getdbt.com/t/how-we-calculate-time-on-task-the-business-hours-between-two-dates/6680/1 "2023-02-08T17:06:30Z")
This is a companion discussion topic for the original entry at [How We Calculate Time on Task, the Business Hours Between Two Dates | dbt Developer Blog](https://docs.getdbt.com/blog/measuring-business-hours-sql-time-on-task)
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### Author:  [@Hastings](https://discourse.getdbt.com/u/Hastings)
#### Post date: [May 31, 2023, 4:04pm UTC](https://discourse.getdbt.com/t/how-we-calculate-time-on-task-the-business-hours-between-two-dates/6680/2 "2023-05-31T16:04:12Z")
Thanks for the incredibly helpful article and repo! I have an interesting issue I’m running into. When I create the ‘attempt-2-subquery’ macro, I am unable to change the names of either macros and have it run successfully in any model. ie. If I keep the names the same as you have defined them (working\_min\_between, business\_minutes\_between\_\_2) dbt is able to locate the macro and run it. However if I change the names to something like ‘working\_minutes’ and ‘business\_minutes\_final’, dbt can’t find the macros under those names. I haven’t run into any issues like this in naming macros before. Do you have a possible explanation on why this is happening?
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### Author:  [@system](https://discourse.getdbt.com/u/system)
#### Post date: [May 31, 2023, 4:04pm UTC](https://discourse.getdbt.com/t/how-we-calculate-time-on-task-the-business-hours-between-two-dates/6680/3 "2023-05-31T16:04:12Z")