Simple searching for term "cal" ...

orbit_calendar 1997 Numbers in orbit.

line_calendar 1997 Zoom through time.

flora_calendar 1997 Dance with a flower.

hanabi_calendar 1997 Typographic fireworks.

umiaki_calendar 1997 Fall meets the sea.

snow_calendar 1997 Snowflake round and round.

math_butterflies 1998 Flying numerical creatures.