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Hi

Could you please see this official letter? Is it OK?

To all,

Please be informed that as on Monday, May 28, the closing time of the school for students is 12:30 and for teachers 2:00.

Regrads,

Thanks,

Tom
Comments 
Hi Tom,

Could you please see this official letter? Is it OK?

To all,

Please be informed that as on Monday, May 28, the closing time of the school for students is 12:30 and for teachers 2:00.

Regrads,

To all students and teachers,



Please note that as of Monday, May 28, school will end for students at 12:30 and for teachers at 2:00.



Sincerely,

'Please be informed' is common, but rather jargon-y.

If you think 'as of Monday' may not be understood by all, you could say 'starting on Monday'.

'Closed ' suggests physically closed and locked'. I'm not sure if that's what you mean.

Clive