'+': '=': increment day '_': '-': decrement day '}': ']': increment month '{': '[': decrment month 'M': 'm': begining of month 'H': 'h': end of month 'Y': 'y': begining of year 'R': 'r': end of year 'T': 't': todayGnuCash can be compile to understand either Eurpean style dates or American Style dates. Grep for UK_DATES in dates.h