格式化 Azure SDK 的 golang 时间

请考虑以下golang 语

today :=  time.Now().Format("2006-01-02T03:04:05.9999999Z")
t, _ := time.Parse(time.RFC3339Nano, today)

为什么这不等同于更简单的

t := time.Now() 

？

根据我目前的经验，我想确认上面的代码是否是等价的，因为我认为它是等价的，或者为什么不等价.我还提供了关于我所try 的其他背景.

我在main.go文件中的完整回购代码here in GitHub.但是，出于这个问题的目的，我们将重点放在下面提供的代码片段上.

sasToken, err := client.ListAccountSAS(
    ctx, resourceGroupName, storageAccountName, armstorage.AccountSasParameters{
    KeyToSign:              to.Ptr("key1"),
    SharedAccessExpiryTime: to.Ptr(func() time.Time { 
        t, _ := time.Parse(time.RFC3339Nano, tomorrow); return t }()),
    Permissions:            to.Ptr(armstorage.PermissionsR),
    Protocols:              to.Ptr(armstorage.HTTPProtocolHTTPSHTTP),
    ResourceTypes:          to.Ptr(armstorage.SignedResourceTypesS),
    Services:               to.Ptr(armstorage.ServicesB),
    SharedAccessStartTime:  to.Ptr(func() time.Time { 
        t, _ := time.Parse(time.RFC3339Nano, today); return t }()),
}, nil)

目前，此代码运行正常.但是，从when I simplify the last line到t := time.Now()会导致错误(如Github操作的Run job中所示).

today 2023-09-18T07:54:42.6314723Z should be formatted as 2023-09-16T11:42:03.1567373Z
tomorrow 2023-09-19T07:54:42.6314723Z should be formattes as 2023-09-17T11:42:03.1567373Z
2023/09/18 07:54:43 POST https://management.azure.com/subscriptions/***/resourceGroups/go-azure-sdk/providers/Microsoft.Storage/storageAccounts/golangazure/ListAccountSas
--------------------------------------------------------------------------------
RESPONSE 400: 400 Bad Request
ERROR CODE: InvalidValuesForRequestParameters
--------------------------------------------------------------------------------
{
  "error": {
    "code": "InvalidValuesForRequestParameters",
    "message": "Values for request parameters are invalid: signedStart."
  }
}
--------------------------------------------------------------------------------
exit status 1

这让我质疑为什么等价性不成立，这与我最初的预期相反.