Although the three-day lakeside event was not due to take place until September, staff at the National Trust landmark have reluctantly had to axe it.
Acclaimed artist, master potter and author Edmund de Waal's curation of works by world-renowned sculptor Henry Moore was due to open on April 3.
Stortford's Bish Bash will take place in 2021 while Stone Valley South is postponed until August this year.
Young visitors can blow off some steam and let their imaginations run riot in the upgraded railway-themed play and picnic area.
Bombay Bicycle Club said: "Very much looking forward to our first appearance at Standon Calling."
The winter work of puzzle enthusiasts will be on show on Saturday at JigFest, featuring more than 100 completed jigsaws, at the Methodist Church.
Family show includes musical clowns, magic and illusion, motorbike madness and mischief and mayhem from Alex the Fireman in a heated big top.
Hina Belitz, who lives in Havers Lane, was invited to take part in the event ahead of publication in March of her second novel, To Lahore, With Love.
East Herts prepares to host one of the UK's hottest festivals for its 15th year this July, with more acts to be announced.
The legendary Northern Irish singer-songwriter will be supported by The Waterboys, the British-Irish folk-rock band.
