ConvertToTime will try to convert a string do time.Time looking for the format that best fits it and assuming "today" when necessary.

GetMonthRange given a time it returns the first and last date of a month.

GetWeekRange given a time it returns the first and last date of a week.

Now returns a time.Time using the local timezone.

Today will return a UTC time.Time for the same day as time.Now() in Local time, but at 0:00:00.000.

TruncateDate clears the hours, minutes and seconds of a time.Time for UTC.

TruncateDateWithTimezone clears the hours, minutes and seconds of a time.Time for a time.Location.