July 31, 2020, 04:09 PM
The Singapore Civil Defence's Public Warning System will be sounded island-wide during this year's National Day.
However it will also ring out tomorrow, August 1, during rehearsal.
These signals will take place at 10.30am and 8.20pm.
Each sounding will last about 20 seconds.
The first signals the Anthem Moment, and the second signals the Pledge Moment.
Click here to find out how the siren will sound like.
Image from Getty and SCDF
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