Rules: | Examples: |

1. to subtract a number of days from current date, use expression like [-NN**d**] | %dd**[-1d]**% |

2. to add a number of days to current date, use expression like [+NN**d**] | %ddd**[+22d]**% |

3. to subtract a number of months from current date, use expression like [-NN**m**] | %dm**[-24m]**% |

4. to add a number of month to current date, use expression like [+NN**m**] | %ddmm**[+1m]**% |

5. to subtract a number of years from current date, use expression like [-NN**y**] | %dmyy**[-2y]**% |

6. to add a number of years to current date, use expression like [+NN**y**] | %ddmmyyyy**[+10y]**% |

7. expression must be concluded in the same percent signs (%) that concludes date variables | **%**ddmm[-1d]**%** - correct expression **%**ddmm**%**[-1d] - invalid expression |

8. expression must be specified after regular date variables | %dd**[-1d]**% - correct expression %**[-1d]**dd% - incorrect expression |

9. you may use only one expression in each macro variable. |
%ddmm[-1m]% - correct expression (one variable and one expression)
%dd[-1d]%%mm[-1m]% - correct expression (2 variables, 1 expression in each variable)
%ddmm[-1d][-1m]% - incorrect expression (2 expressions in one variable) |