After a party is served with process, how much time will they have after service to file hire an attorney or file an appearance?

In an Illinois divorce (dissolution of marriage) case, a person has thirty (30) days from the date that they are served with a summons to file an appearance and a response to the petition for dissolution of marriage. However, there are no "divorce police". It is up to the petitioner to file motions to bring the other party into court and obtain orders to allow the case to proceed.