What is the schedule cron expression for setting up every Monday and Wednesday at 4 PM IST?

Question

What is the schedule cron expression for setting up every Monday and Wednesday at 4 PM IST?

Kunal K 0

I'm trying to set up a recurring schedule using cron expressions. Specifically, I want to schedule a task to run on Mondays and Wednesdays at 4 PM in the Indian Standard Time (IST) timezone. Could you please provide me with the appropriate cron expression to achieve this?

This is related to azure function.
Currently the azure function is running in an server , australian server but i want the timer trigger to hit at every monday, wednesday 4pm Indian standard time?
can anyone tell me what is the proper expression for that?

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Answer 1

VenkateshDodda-MSFT 25,106 Microsoft Employee Moderator

@Kunal K Thank you for reaching out to Microsoft Q&A, apologize for any inconvenience caused on this.
You can use the below CORN expression to run your timer trigger from Monday-Wednesday at 4PM IST.

0 0 16 * * Mon-Wed

If you want to run your function app in IST time zone then you need to add the application settings WEBSITE_TIME_ZONE with value India Standard Time.

Ideally, function app will run in UTC time zone if you want to keep function app running in time zone and you want your time trigger to get triggered at 4PM IST you need to change the CORN Expression.

0 30 10 * * Mon-Wed

You can make use this NCORN expression generator to review/evaluate your CORN expression

Feel free to reach back to me if you have any questions on this.

Kunal K 0 Reputation points

2023-07-13T09:51:18.9833333+00:00

Hi @VenkateshDodda-MSFT , thanks for reply, actually I wanted to run only on 'Monday' and 'Wednesday' 4pm, not from monday to wednesday.
In this case, what would be the modified expression?
VenkateshDodda-MSFT 25,106 Reputation points Microsoft Employee Moderator

2023-07-13T09:56:29.23+00:00

@Kunal K Thanks for your response. Please change the above CORN expression to this 0 0 16 * * Mon,Wed
Kunal K 0 Reputation points

2023-07-13T11:20:03.0633333+00:00

@VenkateshDodda-MSFT , hey thanks! by the way i have a question, i ran my azure function multiple times but not even a single time the logs are getting stored in azure portal.
when i click monitor its 0.
why's that happening?
My azure function based on timer trigger, i have ran it for every 5 min, it is running i can see the logs in SQL db but i am unable to see the logs in portal.
VenkateshDodda-MSFT 25,106 Reputation points Microsoft Employee Moderator

2023-07-13T11:50:55.8033333+00:00

@Kunal K Thanks for your response.
Have you configured application insights in your function app? then only the logs will be shown in azure monitor, and you will be able to see logs from monitor tab.
I am not sure how you have configured; I assume that you are routing the logs to SQL DB instead of using application insights.
Kunal K 0 Reputation points

2023-07-13T12:31:18.81+00:00

I have enabled application insights in portal but still i couldnt able to see the logs in azure monitor.
I am not routing the azure function apps logs to SQL DB but instead i created a python code which will save logs to SQL DB once the code ran succesfully.
VenkateshDodda-MSFT 25,106 Reputation points Microsoft Employee Moderator

2023-07-14T13:01:00.1733333+00:00

@Kunal K Thanks for your response, Could you please help us with the sample code so that we can test it and assist you further on this accordingly.
Kunal K 0 Reputation points

2023-07-19T04:13:17.2966667+00:00

hey again @VenkateshDodda-MSFT , actually there is another issue in my azure function.
I set my cron expression to 0 0 16 * * Mon,Wed
its executing at 4.07 pm but not at 4.00 pm sharp.
what could be the issue?
VenkateshDodda-MSFT 25,106 Reputation points Microsoft Employee Moderator

2023-07-19T08:48:56.2933333+00:00
@Kunal K Thanks for your response. This might be caused because of clock drift or you might be using runOnStartup property in your function.json.

As mentioned here in the documentation It is not recommended to set runOnStartup to true in production. Using this setting makes code execute at highly unpredictable times. In certain production settings, these extra executions can result in significantly higher costs for apps hosted in a Consumption plan.

The beneath compute infrastructure will remain the same for any of the Azure services. Most of the time it will provide the time accuracy but there is no SLA for the same. You don't have control over the time accuracy that is provided by the azure function. In the very rare cases, there might be a clock drift issue that could cause the inaccuracy of the time. Azure Premium plan doesn’t change anything regarding the time accuracy. For more information about the clock drift issue, you can refer to this similar thread and also the blog post.

If you still need more information, I suggest you raise a support ticket to function app support team to investigate and assist you further on this.

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What is the schedule cron expression for setting up every Monday and Wednesday at 4 PM IST?

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