# What time is specified by concept 58645-3 ?
**URL:** https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836
**Category:** chemistry
**Created:** [May 21, 2014, 8:40am UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836 "2014-05-21T08:40:10Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@yanagisawa](https://forum.loinc.org/u/yanagisawa)
#### Post date: [May 21, 2014, 8:40am UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836/1 "2014-05-21T08:40:10Z")
Regarding to a concept **58645-3 Cortisol [Moles/volume] in Saliva (oral fluid) --12 PM specimen**, the Chinese language variant showed “
皮质醇^晚上12点标本” which indicates midnight cortisol. However, in the related names there is a “Noon” which implied the test is noon cortisol?
May I know what time is actually specified by this concept in case I want to provide LOINC code for cortisol with late-night sample?
Thank you very much!
Best Regards,
Wai Kin CHEUNG
Health Informatics
Hong Kong Hospital Authority
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### Author:  [@pdbanning](https://forum.loinc.org/u/pdbanning)
#### Post date: [May 22, 2014, 11:02pm UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836/2 "2014-05-22T23:02:48Z")
Hello!
I can affirm in English this concept is intended to be 12 noon (mid day). I will leave it up to the translators to investigate the Chinese language variant.
If you should need the midnight saliva Cortisol measurement, the LOINC code is 58643-8
Best regards,
Pam
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### Author:  [@yanagisawa](https://forum.loinc.org/u/yanagisawa)
#### Post date: [May 23, 2014, 2:01am UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836/3 "2014-05-23T02:01:51Z")
Dear Pam,
Thank you very much! By the way, the situation is quite funny. Some people counting time like this:
1. 4AM=morning, before sunrise.
2. 8AM=morning, breakfast time.
3. 12AM=noon, lunch time.
4. 4PM=afternoon, before sunset.
5. 8PM=evening, dinner time.
6. 12PM=midnight.
I am thinking whether 12 AM or 12 PM to indicate midnight and noon is a bit confusing? Will LOINC consider to apply ISO8601 24-hour-clock standard in either the LOINC common name or related name, to clear off uncertainty?
Thank you again.
Best Regards,
Wai Kin CHEUNG
Health Informatics
Hong Kong Hospital Authority
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### Author:  [@lcarey](https://forum.loinc.org/u/lcarey)
#### Post date: [May 23, 2014, 4:06pm UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836/4 "2014-05-23T16:06:24Z")
Interesting comments. In Canada we use the 24 hour clock as our standard for these tests and it does eliminate any confusion. For the tests listed we provide:
58645-3 Cortisol 1200h
58643-8 Cortisol 2400h
I agree that incorporating the 24 hour clock into the Long Common Name makes sense, so revised names would appear as:
58645-3 Cortisol [Moles/volume] in Saliva (oral fluid) --1200h specimen
58643-8 Cortisol [Moles/volume] in Saliva (oral fluid) --2400h specimen
Regards,
Lorie Carey
Standards SME
Canada Health Infoway
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### Author:  [@system](https://forum.loinc.org/u/system)
#### Post date: [June 23, 2023, 3:36pm UTC](https://forum.loinc.org/t/what-time-is-specified-by-concept-58645-3/836/5 "2023-06-23T15:36:31Z")