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There is some celebration. Now official kind but the night life is affected so there is not much fun this year.
Even the expatriate one had gone virtual:
https://thenewageparents.com/halloween-at-woodgrove-singapore/
I went to join the fund before a couple of times.
This was 4 years ago:
https://steemit.com/photography/@ace108/halloween-2016-in-singapore-2016-by-ace108
https://steemit.com/photography/@ace108/happy-halloween-trick-or-treat-in-singapore-by-ace108