2. Dinner party is a cultural thing, because we didn’t eat during the day and we have the same time to break fast, it became a party because everyone do it at the same time and usually at the same place. But the day of breaking fast (the Eid Iftar), you are supposed to eat in the morning to declare that Ramadan has ended and you can continue eat at day.
3. Another cultural things. Here, it happens few days before the end of Ramadan. The government mandates company to pay bonus during religious celebrations (christmas for christians, eid iftar for moslem, chinese new year for chinese, etc).