AWS SDK for .NET Documentation
ValidFrom Property
AmazonAmazon.EC2.ModelRequestSpotInstancesRequestValidFrom Did this page help you?   Yes   No    Tell us about it...
Start date of the request. If this is a one-time request, the request remains active until all instances launch, the request expires, or the request is canceled. If the request is persistent, it remains active until it expires or is canceled. Default: Request is effective immediately
Declaration Syntax
C#
public string ValidFrom { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)