The calendar system based on Christ is known as the Gregorian calendar. It was introduced by Pope Gregory XIII in 1582 as a reform of the Julian calendar. The Gregorian calendar is based on the birth of Jesus Christ, with the year 1 AD marking the traditional birth year of Jesus. This calendar is widely used around the world today for civil purposes. **

To delete a calendar in Google Calendar, first, go to the left side of the page and find the "My calendars" section. Then, hover over the calendar you want to delete and click on the three dots that appear. From the dropdown menu, select "Settings and sharing." Scroll down to the bottom of the settings page and click "Remove calendar" under the "Delete" section. Confirm the deletion by clicking "Permanently delete" in the pop-up window. This will remove the calendar from your Google Calendar account. **

No, the Arabic-Islamic calendar did not orient itself around the Jewish calendar. The Arabic-Islamic calendar is a lunar calendar based on the cycles of the moon, while the Jewish calendar is a lunisolar calendar that incorporates both lunar and solar elements. The two calendars have different starting points and methods of calculating months and years. **

No, the Arab-Islamic calendar did not orient itself to the Jewish calendar. The Arab-Islamic calendar, also known as the Hijri calendar, is a lunar calendar based on the cycles of the moon, while the Jewish calendar is a lunisolar calendar that incorporates both lunar and solar cycles. The two calendars have different starting points and different methods for determining the length of a year, so they do not align with each other. **

It ultimately depends on personal preference and how you plan to use the calendar. A desk calendar is convenient for keeping track of daily appointments and tasks right at your workspace, while a wall calendar can serve as a visual reminder for the entire household and can be easily seen by everyone. If you prefer a more portable option and want to keep your schedule close at hand, a desk calendar might be the better choice. However, if you want a larger display that can be seen by multiple people, a wall calendar would be more suitable. **

To synchronize the iServ calendar with the Google calendar, you can use the iCal feed feature. First, log in to your iServ account and navigate to the calendar section. Then, find the iCal feed link for your calendar and copy it. Next, go to your Google calendar, click on the "+" sign next to "Other calendars" and select "From URL". Paste the iCal feed link into the URL field and click "Add calendar". This will synchronize your iServ calendar with your Google calendar, allowing you to view and manage both calendars in one place. **

Our calendar, the Gregorian calendar, is widely accepted and used around the world. It is based on the Earth's orbit around the sun and has been adjusted over time to account for inaccuracies in previous calendars. While it is not perfect, the Gregorian calendar is considered to be accurate for most practical purposes. However, some argue that there are more accurate ways to measure time, such as astronomical calendars or lunar calendars. **

It is not clear which specific calendar is being referred to in the question. There are many different calendars used around the world, including the Gregorian calendar, the Islamic calendar, the Chinese calendar, and many others. It would be helpful to provide more context or specify which calendar is being asked about in order to provide a more accurate answer. **