➕ محاسبهٔ جمع یا تفریق روزها

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the calculator is not working, you can use the "add or subtract days" function to move the calendar date. The calculator will automatically add or subtract the days from the calendar date, and the resulting calendar date will be moved to the next day of the week. The calculator will also show the net shift in days from the calendar date to the date of the calendar day. The calculator will also show the net shift in days from the calendar date to the date of the calendar day. The calculator will also show the net shift in days from the calendar date to the date of the calendar day.For example,For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day 317 of the year, a net shift of +90 days.For a working example, start on Friday 15 August 2025 and add 90 days: the tool returns Thursday 13 November 2025, day