When was the calligraphy magazine changed into a monthly magazine?

1999. By inquiring about the new measures of China Calligraphy in the new year, we know that China Calligraphy, the authoritative publication of contemporary China calligraphy sponsored by China Calligraphers Association, has been changed from bimonthly to monthly since 1999. As a national Chinese core periodical, China Calligraphy magazine changed its format to 16 (international format) on the basis of strengthening academic authority, rich materials and popularity of readers.