如果您接收到“MMMM”作为响应，那么您可能正在获取月份，然后将其转换为定义格式的字符串。

DateTime.Now.Month.ToString("MMMM") 

将输出"MMMM"

DateTime.Now.ToString("MMMM") 

是否输出月份名称

使用"MMMM"自定义格式说明符:

DateTime.Now.ToString("MMMM");

如果你需要三个月的信件，请使用“MMM”

DateTime birthDate = new DateTime(1981, 8, 9);
Console.WriteLine ("I was born on the {0}. of {1}, {2}.", birthDate.Day, birthDate.ToString("MMMM"), birthDate.Year);

/* The above code will say:
"I was born on the 9. of august, 1981."

"dd" converts to the day (01 thru 31).
"ddd" converts to 3-letter name of day (e.g. mon).
"dddd" converts to full name of day (e.g. monday).
"MMM" converts to 3-letter name of month (e.g. aug).
"MMMM" converts to full name of month (e.g. august).
"yyyy" converts to year.
*/

您可以使用系统中的CultureInfo。全球化来获取数据，基于当前正在使用的文化。

_ = CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(DateTime.Now.Month)

或者，使用InvariantCulture来获得英文名称。

_ = CultureInfo.InvariantCulture.DateTimeFormat.GetMonthName(DateTime.Now.Month);

你可以使用文化来获取你国家的月份名称，比如:

System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("ar-EG");
string FormatDate = DateTime.Now.ToString("dddd., MMM dd yyyy, hh:MM tt", culture);