Does the waiting period (iddah) for both wives end at the same time, despite differences in country of residence and time zones?

Each wife of the deceased maternal uncle observes an 'iddah (definition) (waiting period) of death, which is four months and ten days, beginning from the time of death. Each wife calculates her 'iddah according to the time zone of her country, and the time difference between the two countries does not affect it. If one or both of them are pregnant, her 'iddah ends upon delivery.