There is no standard 8-to-6 overlap. Someone joins early or late.
Calgary is 14 hours behind Singapore, which is far enough that a normal 9-to-5 in one city never reaches the other's working hours. One practical option: Calgary dials in early while it's still late afternoon or evening in Singapore. Remember that Calgary shifts for daylight saving and Singapore doesn't, so recalculate the overlap after each clock change.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Singapore Asia/Singapore | ||||||||||||||||||||||||
Calgary America/Edmonton |
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